diff --git a/.changeset/fast-snakes-move.md b/.changeset/fast-snakes-move.md
new file mode 100644
index 0000000000..889042622e
--- /dev/null
+++ b/.changeset/fast-snakes-move.md
@@ -0,0 +1,6 @@
+---
+"@redocly/respect-core": minor
+"@redocly/cli": minor
+---
+
+Added response size to the `Respect` terminal and JSON file outputs.
diff --git a/__tests__/respect/consider-severity-in-next-step-execution/__snapshots__/consider-severity-in-next-step-execution.test.ts.snap b/__tests__/respect/consider-severity-in-next-step-execution/__snapshots__/consider-severity-in-next-step-execution.test.ts.snap
index b4289d841a..559196de02 100644
--- a/__tests__/respect/consider-severity-in-next-step-execution/__snapshots__/consider-severity-in-next-step-execution.test.ts.snap
+++ b/__tests__/respect/consider-severity-in-next-step-execution/__snapshots__/consider-severity-in-next-step-execution.test.ts.snap
@@ -16,6 +16,7 @@ exports[`should not follow the default behavior to break and return if onFailure
     Response status code: 200
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       [
         {
@@ -90,6 +91,7 @@ exports[`should not follow the default behavior to break and return if onFailure
     Response status code: 200
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       [
         {
@@ -228,6 +230,7 @@ exports[`should not follow the default behavior to break and return if onFailure
     Response status code: 200
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       [
         {
diff --git a/__tests__/respect/implicit/__snapshots__/implicit.test.ts.snap b/__tests__/respect/implicit/__snapshots__/implicit.test.ts.snap
index 9400461d04..8af977fc5a 100644
--- a/__tests__/respect/implicit/__snapshots__/implicit.test.ts.snap
+++ b/__tests__/respect/implicit/__snapshots__/implicit.test.ts.snap
@@ -32,6 +32,7 @@ exports[`should implicitly add content type header based on requestBody.content
     Response status code: 204
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       {} 
  
@@ -67,6 +68,7 @@ exports[`should implicitly add content type header based on requestBody.content
     Response status code: 400
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       {
         "type": "http://example.com",
diff --git a/__tests__/respect/inputs-passed-to-step-target-workflow-and-remapped/__snapshots__/inputs-passed-to-step-target-workflow-and-remapped.test.ts.snap b/__tests__/respect/inputs-passed-to-step-target-workflow-and-remapped/__snapshots__/inputs-passed-to-step-target-workflow-and-remapped.test.ts.snap
index 5311ecf815..9c40e9eb01 100644
--- a/__tests__/respect/inputs-passed-to-step-target-workflow-and-remapped/__snapshots__/inputs-passed-to-step-target-workflow-and-remapped.test.ts.snap
+++ b/__tests__/respect/inputs-passed-to-step-target-workflow-and-remapped/__snapshots__/inputs-passed-to-step-target-workflow-and-remapped.test.ts.snap
@@ -35,6 +35,7 @@ exports[`should pass inputs to step target workflow with additional input parame
     Response status code: 400
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       {
         "type": "object",
diff --git a/__tests__/respect/inputs-passed-to-step-target-workflow/__snapshots__/inputs-passed-to-step-target-workflow.test.ts.snap b/__tests__/respect/inputs-passed-to-step-target-workflow/__snapshots__/inputs-passed-to-step-target-workflow.test.ts.snap
index ffb9810efb..e485c4c8e4 100644
--- a/__tests__/respect/inputs-passed-to-step-target-workflow/__snapshots__/inputs-passed-to-step-target-workflow.test.ts.snap
+++ b/__tests__/respect/inputs-passed-to-step-target-workflow/__snapshots__/inputs-passed-to-step-target-workflow.test.ts.snap
@@ -35,6 +35,7 @@ exports[`should pass inputs to step target workflow with additional input parame
     Response status code: 201
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       {
         "eventId": "dad4bce8-f5cb-4078-a211-995864315e39",
diff --git a/__tests__/respect/inputs-with-cli-and-env/__snapshots__/inputs-with-cli-and-env.test.ts.snap b/__tests__/respect/inputs-with-cli-and-env/__snapshots__/inputs-with-cli-and-env.test.ts.snap
index 75c56a3e8f..61839bc3a5 100644
--- a/__tests__/respect/inputs-with-cli-and-env/__snapshots__/inputs-with-cli-and-env.test.ts.snap
+++ b/__tests__/respect/inputs-with-cli-and-env/__snapshots__/inputs-with-cli-and-env.test.ts.snap
@@ -16,6 +16,7 @@ exports[`should use inputs from CLI and env 1`] = `
     Response status code: 200
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       [
         {
@@ -96,6 +97,7 @@ exports[`should use inputs from CLI and env 1`] = `
     Response status code: 201
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       {
         "message": "Museum general entry ticket purchased",
@@ -122,6 +124,7 @@ exports[`should use inputs from CLI and env 1`] = `
     Response status code: 200
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       [
         {
@@ -211,6 +214,7 @@ exports[`should use inputs from CLI and env 1`] = `
     Response status code: 201
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       {
         "eventId": "dad4bce8-f5cb-4078-a211-995864315e39",
diff --git a/__tests__/respect/mask-input-secrets/__snapshots__/mask-input-secrets.test.ts.snap b/__tests__/respect/mask-input-secrets/__snapshots__/mask-input-secrets.test.ts.snap
index 2ca2f252cc..a767d80610 100644
--- a/__tests__/respect/mask-input-secrets/__snapshots__/mask-input-secrets.test.ts.snap
+++ b/__tests__/respect/mask-input-secrets/__snapshots__/mask-input-secrets.test.ts.snap
@@ -20,6 +20,7 @@ exports[`should hide sensitive input values 1`] = `
     Response status code: 200
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       [
         {
@@ -95,6 +96,7 @@ exports[`should hide sensitive input values 1`] = `
     Response status code: 200
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       [
         {
@@ -245,6 +247,7 @@ exports[`should hide sensitive input values 1`] = `
     Response status code: 201
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       {
         "eventId": "dad4bce8-f5cb-4078-a211-995864315e39",
diff --git a/__tests__/respect/outputs-access-syntax-variations/__snapshots__/outputs-access-syntax-variations.test.ts.snap b/__tests__/respect/outputs-access-syntax-variations/__snapshots__/outputs-access-syntax-variations.test.ts.snap
index dcc76b9c4b..674dba57c1 100644
--- a/__tests__/respect/outputs-access-syntax-variations/__snapshots__/outputs-access-syntax-variations.test.ts.snap
+++ b/__tests__/respect/outputs-access-syntax-variations/__snapshots__/outputs-access-syntax-variations.test.ts.snap
@@ -16,6 +16,7 @@ exports[`should resolve outputs access syntax variations 1`] = `
     Response status code: 200
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       [
         {
@@ -96,6 +97,7 @@ exports[`should resolve outputs access syntax variations 1`] = `
     Response status code: 201
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       {
         "message": "Museum general entry ticket purchased",
@@ -126,6 +128,7 @@ exports[`should resolve outputs access syntax variations 1`] = `
     Response status code: 200
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       [
         {
@@ -272,6 +275,7 @@ exports[`should resolve outputs access syntax variations 1`] = `
     Response status code: 201
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       {
         "eventId": "dad4bce8-f5cb-4078-a211-995864315e39",
@@ -306,6 +310,7 @@ exports[`should resolve outputs access syntax variations 1`] = `
     Response status code: 200
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       {
         "eventId": "6744a0da-4121-49cd-8479-f8cc20526495",
diff --git a/__tests__/respect/replacements/__snapshots__/replacements.test.ts.snap b/__tests__/respect/replacements/__snapshots__/replacements.test.ts.snap
index b2d4fdfaf6..db8547fce5 100644
--- a/__tests__/respect/replacements/__snapshots__/replacements.test.ts.snap
+++ b/__tests__/respect/replacements/__snapshots__/replacements.test.ts.snap
@@ -16,6 +16,7 @@ exports[`should replace values in the request body 1`] = `
     Response status code: 200
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       {
         "eventId": "6744a0da-4121-49cd-8479-f8cc20526495",
@@ -57,6 +58,7 @@ exports[`should replace values in the request body 1`] = `
     Response status code: 400
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       {
         "type": "object",
@@ -81,6 +83,7 @@ exports[`should replace values in the request body 1`] = `
     Response status code: 400
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       {
         "type": "object",
@@ -105,6 +108,7 @@ exports[`should replace values in the request body 1`] = `
     Response status code: 400
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       {
         "type": "object",
diff --git a/__tests__/respect/reusable-components/__snapshots__/reusable-components.test.ts.snap b/__tests__/respect/reusable-components/__snapshots__/reusable-components.test.ts.snap
index c6bc63d828..e502794f2e 100644
--- a/__tests__/respect/reusable-components/__snapshots__/reusable-components.test.ts.snap
+++ b/__tests__/respect/reusable-components/__snapshots__/reusable-components.test.ts.snap
@@ -17,6 +17,7 @@ exports[`should use inputs from CLI and env to map with resolved refs 1`] = `
     Response status code: 200
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       [
         {
@@ -88,6 +89,7 @@ exports[`should use inputs from CLI and env to map with resolved refs 1`] = `
     Response status code: 200
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       [
         {
@@ -162,6 +164,7 @@ exports[`should use inputs from CLI and env to map with resolved refs 1`] = `
     Response status code: 200
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       [
         {
@@ -239,6 +242,7 @@ exports[`should use inputs from CLI and env to map with resolved refs 1`] = `
     Response status code: 200
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       [
         {
@@ -393,6 +397,7 @@ exports[`should use inputs from CLI and env to map with resolved refs 1`] = `
     Response status code: 201
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       {
         "eventId": "dad4bce8-f5cb-4078-a211-995864315e39",
@@ -427,6 +432,7 @@ exports[`should use inputs from CLI and env to map with resolved refs 1`] = `
     Response status code: 200
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       [
         {
diff --git a/__tests__/respect/reveal-masked-input-secrets/__snapshots__/reveal-masked-input-secrets.test.ts.snap b/__tests__/respect/reveal-masked-input-secrets/__snapshots__/reveal-masked-input-secrets.test.ts.snap
index 2de9794cf1..ef0a2abb3f 100644
--- a/__tests__/respect/reveal-masked-input-secrets/__snapshots__/reveal-masked-input-secrets.test.ts.snap
+++ b/__tests__/respect/reveal-masked-input-secrets/__snapshots__/reveal-masked-input-secrets.test.ts.snap
@@ -20,6 +20,7 @@ exports[`should reveal masked input values 1`] = `
     Response status code: 200
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       [
         {
@@ -95,6 +96,7 @@ exports[`should reveal masked input values 1`] = `
     Response status code: 200
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       [
         {
@@ -245,6 +247,7 @@ exports[`should reveal masked input values 1`] = `
     Response status code: 201
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       {
         "eventId": "dad4bce8-f5cb-4078-a211-995864315e39",
diff --git a/__tests__/respect/severity-error-level/__snapshots__/severity-error-level.test.ts.snap b/__tests__/respect/severity-error-level/__snapshots__/severity-error-level.test.ts.snap
index 8f048f4a64..20b92b4990 100644
--- a/__tests__/respect/severity-error-level/__snapshots__/severity-error-level.test.ts.snap
+++ b/__tests__/respect/severity-error-level/__snapshots__/severity-error-level.test.ts.snap
@@ -17,6 +17,7 @@ exports[`should use error severity level 1`] = `
     Response status code: 200
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       [
         {
@@ -101,6 +102,7 @@ exports[`should use error severity level 1`] = `
     Response status code: 201
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       {
         "eventId": "dad4bce8-f5cb-4078-a211-995864315e39",
@@ -142,6 +144,7 @@ exports[`should use error severity level 1`] = `
     Response status code: 200
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       {
         "eventId": "dad4bce8-f5cb-4078-a211-995864315e39",
diff --git a/__tests__/respect/severity-off-level/__snapshots__/severity-off-level.test.ts.snap b/__tests__/respect/severity-off-level/__snapshots__/severity-off-level.test.ts.snap
index 4d492b7e36..5ed3303d77 100644
--- a/__tests__/respect/severity-off-level/__snapshots__/severity-off-level.test.ts.snap
+++ b/__tests__/respect/severity-off-level/__snapshots__/severity-off-level.test.ts.snap
@@ -17,6 +17,7 @@ exports[`should use off severity level 1`] = `
     Response status code: 200
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       [
         {
@@ -101,6 +102,7 @@ exports[`should use off severity level 1`] = `
     Response status code: 201
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       {
         "eventId": "dad4bce8-f5cb-4078-a211-995864315e39",
@@ -142,6 +144,7 @@ exports[`should use off severity level 1`] = `
     Response status code: 200
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       {
         "eventId": "dad4bce8-f5cb-4078-a211-995864315e39",
diff --git a/__tests__/respect/severity-warn-level/__snapshots__/severity-warn-level.test.ts.snap b/__tests__/respect/severity-warn-level/__snapshots__/severity-warn-level.test.ts.snap
index b635277316..00f91498f2 100644
--- a/__tests__/respect/severity-warn-level/__snapshots__/severity-warn-level.test.ts.snap
+++ b/__tests__/respect/severity-warn-level/__snapshots__/severity-warn-level.test.ts.snap
@@ -17,6 +17,7 @@ exports[`should use warn severity level 1`] = `
     Response status code: 200
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       [
         {
@@ -101,6 +102,7 @@ exports[`should use warn severity level 1`] = `
     Response status code: 201
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       {
         "eventId": "dad4bce8-f5cb-4078-a211-995864315e39",
@@ -142,6 +144,7 @@ exports[`should use warn severity level 1`] = `
     Response status code: 200
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       {
         "eventId": "dad4bce8-f5cb-4078-a211-995864315e39",
diff --git a/__tests__/respect/x-security-api-key-auth/__snapshots__/x-security-api-key-auth.test.ts.snap b/__tests__/respect/x-security-api-key-auth/__snapshots__/x-security-api-key-auth.test.ts.snap
index 9089b13340..7181740405 100644
--- a/__tests__/respect/x-security-api-key-auth/__snapshots__/x-security-api-key-auth.test.ts.snap
+++ b/__tests__/respect/x-security-api-key-auth/__snapshots__/x-security-api-key-auth.test.ts.snap
@@ -17,6 +17,7 @@ exports[`should make request with X-API-KEY in header 1`] = `
     Response status code: 200
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       [
         {
diff --git a/__tests__/respect/x-security-basic-auth/__snapshots__/x-security-basic-auth.test.ts.snap b/__tests__/respect/x-security-basic-auth/__snapshots__/x-security-basic-auth.test.ts.snap
index beadd89c12..17c86c16aa 100644
--- a/__tests__/respect/x-security-basic-auth/__snapshots__/x-security-basic-auth.test.ts.snap
+++ b/__tests__/respect/x-security-basic-auth/__snapshots__/x-security-basic-auth.test.ts.snap
@@ -16,6 +16,7 @@ exports[`should make request with Authorization header \`Basic ...\` 1`] = `
     Response status code: 200
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       [
         {
diff --git a/__tests__/respect/x-security-bearer-auth/__snapshots__/x-security-bearer-auth.test.ts.snap b/__tests__/respect/x-security-bearer-auth/__snapshots__/x-security-bearer-auth.test.ts.snap
index cdf06bc2b0..4eb24a4134 100644
--- a/__tests__/respect/x-security-bearer-auth/__snapshots__/x-security-bearer-auth.test.ts.snap
+++ b/__tests__/respect/x-security-bearer-auth/__snapshots__/x-security-bearer-auth.test.ts.snap
@@ -16,6 +16,7 @@ exports[`should make request with Authorization header \`Bearer ...\` 1`] = `
     Response status code: 200
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       [
         {
diff --git a/__tests__/respect/x-security-oauth2-auth/__snapshots__/x-security-oauth2-auth.test.ts.snap b/__tests__/respect/x-security-oauth2-auth/__snapshots__/x-security-oauth2-auth.test.ts.snap
index ecd7a3ed57..a0f27c6e42 100644
--- a/__tests__/respect/x-security-oauth2-auth/__snapshots__/x-security-oauth2-auth.test.ts.snap
+++ b/__tests__/respect/x-security-oauth2-auth/__snapshots__/x-security-oauth2-auth.test.ts.snap
@@ -16,6 +16,7 @@ exports[`should make request with Authorization header \`Bearer ...\` using OAut
     Response status code: 200
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       [
         {
diff --git a/__tests__/respect/x-security-on-workflow-level-merged-to-steps/__snapshots__/x-security-on-workflow-level-merged-to-steps.test.ts.snap b/__tests__/respect/x-security-on-workflow-level-merged-to-steps/__snapshots__/x-security-on-workflow-level-merged-to-steps.test.ts.snap
index 909e541b30..27953b05fe 100644
--- a/__tests__/respect/x-security-on-workflow-level-merged-to-steps/__snapshots__/x-security-on-workflow-level-merged-to-steps.test.ts.snap
+++ b/__tests__/respect/x-security-on-workflow-level-merged-to-steps/__snapshots__/x-security-on-workflow-level-merged-to-steps.test.ts.snap
@@ -16,6 +16,7 @@ exports[`should merge x-security schemes on workflow level to steps 1`] = `
     Response status code: 200
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       [
         {
@@ -97,6 +98,7 @@ exports[`should merge x-security schemes on workflow level to steps 1`] = `
     Response status code: 201
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       {
         "eventId": "dad4bce8-f5cb-4078-a211-995864315e39",
diff --git a/__tests__/respect/x-security-open-id-connect-auth/__snapshots__/x-security-open-id-connect-auth.test.ts.snap b/__tests__/respect/x-security-open-id-connect-auth/__snapshots__/x-security-open-id-connect-auth.test.ts.snap
index 77dc9b2376..c5cf7f86b1 100644
--- a/__tests__/respect/x-security-open-id-connect-auth/__snapshots__/x-security-open-id-connect-auth.test.ts.snap
+++ b/__tests__/respect/x-security-open-id-connect-auth/__snapshots__/x-security-open-id-connect-auth.test.ts.snap
@@ -16,6 +16,7 @@ exports[`should make request with Authorization header \`Bearer ...\` using Open
     Response status code: 200
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       [
         {
diff --git a/__tests__/respect/x-security-resolve-scheme-name/__snapshots__/x-security-resolve-scheme-name.test.ts.snap b/__tests__/respect/x-security-resolve-scheme-name/__snapshots__/x-security-resolve-scheme-name.test.ts.snap
index f5c3171e7f..876be8063d 100644
--- a/__tests__/respect/x-security-resolve-scheme-name/__snapshots__/x-security-resolve-scheme-name.test.ts.snap
+++ b/__tests__/respect/x-security-resolve-scheme-name/__snapshots__/x-security-resolve-scheme-name.test.ts.snap
@@ -16,6 +16,7 @@ exports[`should resolve securitySchemes described in x-security by schemeName 1`
     Response status code: 200
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       [
         {
@@ -85,6 +86,7 @@ exports[`should resolve securitySchemes described in x-security by schemeName 1`
     Response status code: 200
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       [
         {
diff --git a/__tests__/respect/x-security-scheme-apply-order/__snapshots__/x-security-scheme-apply-order.test.ts.snap b/__tests__/respect/x-security-scheme-apply-order/__snapshots__/x-security-scheme-apply-order.test.ts.snap
index 1b4ed01655..d284bb05a5 100644
--- a/__tests__/respect/x-security-scheme-apply-order/__snapshots__/x-security-scheme-apply-order.test.ts.snap
+++ b/__tests__/respect/x-security-scheme-apply-order/__snapshots__/x-security-scheme-apply-order.test.ts.snap
@@ -18,6 +18,7 @@ exports[`should apply x-security schemes in Top-Down order, the Last one have bi
     Response status code: 200
     Response time: <test> ms
     Response Headers: <response headers test>
+    Response Size: <test> bytes
     Response Body:
       [
         {
diff --git a/packages/cli/src/commands/respect/json-logs.ts b/packages/cli/src/commands/respect/json-logs.ts
index 383b1fce05..a09b207a61 100644
--- a/packages/cli/src/commands/respect/json-logs.ts
+++ b/packages/cli/src/commands/respect/json-logs.ts
@@ -89,6 +89,7 @@ function mapJsonStep(
       body: publicStep.response?.body,
       headers: step.response?.header || {},
       time: step.response?.time || 0,
+      size: step.response?.responseSize,
     },
     checks: step.checks.map((check) => ({
       ...check,
diff --git a/packages/respect-core/src/modules/logger-output/display-checks.ts b/packages/respect-core/src/modules/logger-output/display-checks.ts
index 37a5e204c9..a49c60073e 100644
--- a/packages/respect-core/src/modules/logger-output/display-checks.ts
+++ b/packages/respect-core/src/modules/logger-output/display-checks.ts
@@ -74,6 +74,7 @@ function displayVerboseLogs({
 }): string {
   const { path, host, headerParams, body, statusCode } = logs;
   const responseTime = !isBrowser && process.env.NODE_ENV === 'test' ? '<test>' : logs.responseTime;
+  const responseSize = !isBrowser && process.env.NODE_ENV === 'test' ? '<test>' : logs.responseSize;
 
   const urlString = indent(`Request URL: ${blue(combineUrl(host, path))}`, 4);
   const requestHeadersString = indent(`Request Headers:`, 4);
@@ -131,6 +132,7 @@ function displayVerboseLogs({
     !isBrowser && process.env.NODE_ENV === 'test'
       ? gray(indent('Response Headers: <response headers test>', 4))
       : headersString && gray(responseHeadersString) + '\n' + gray(headersString),
+    responseSize && gray(indent('Response Size: ' + blue(responseSize as number), 4) + ' bytes'),
     body && gray(responseBodyString),
     body && bodyString,
   ]
diff --git a/packages/respect-core/src/modules/logger-output/verbose-logs.ts b/packages/respect-core/src/modules/logger-output/verbose-logs.ts
index 2842cb422b..a01ee08217 100644
--- a/packages/respect-core/src/modules/logger-output/verbose-logs.ts
+++ b/packages/respect-core/src/modules/logger-output/verbose-logs.ts
@@ -8,6 +8,7 @@ export function getVerboseLogs({
   body,
   statusCode,
   responseTime,
+  responseSize,
 }: VerboseLog): VerboseLog {
   const verboseLogs: VerboseLog = {
     path,
@@ -36,5 +37,9 @@ export function getVerboseLogs({
     verboseLogs.responseTime = responseTime;
   }
 
+  if (responseSize !== undefined) {
+    verboseLogs.responseSize = responseSize;
+  }
+
   return verboseLogs;
 }
diff --git a/packages/respect-core/src/types.ts b/packages/respect-core/src/types.ts
index 699c376c3c..d73539516f 100644
--- a/packages/respect-core/src/types.ts
+++ b/packages/respect-core/src/types.ts
@@ -73,6 +73,7 @@ export type VerboseLog = {
   headerParams?: Record<string, string>;
   statusCode?: number;
   responseTime?: number;
+  responseSize?: number;
 };
 type AdditionalStepProps = {
   verboseLog?: VerboseLog;
@@ -238,6 +239,7 @@ export interface StepExecutionResult {
     body: any;
     headers: Record<string, string | number | boolean>;
     time: number;
+    size: number | undefined;
   };
   checks: (Check & { status: ExecutionStatus })[];
 }
diff --git a/packages/respect-core/src/utils/api-fetcher.ts b/packages/respect-core/src/utils/api-fetcher.ts
index 96c50b9da1..fe1deb6ded 100644
--- a/packages/respect-core/src/utils/api-fetcher.ts
+++ b/packages/respect-core/src/utils/api-fetcher.ts
@@ -100,6 +100,7 @@ export class ApiFetcher implements IFetcher {
     body,
     statusCode,
     responseTime,
+    responseSize,
   }: VerboseLog) => {
     this.verboseResponseLogs = getVerboseLogs({
       headerParams,
@@ -109,6 +110,7 @@ export class ApiFetcher implements IFetcher {
       body,
       statusCode,
       responseTime,
+      responseSize,
     });
   };
 
@@ -316,6 +318,7 @@ export class ApiFetcher implements IFetcher {
           path: pathWithSearchParams || '',
           statusCode: first401Result.status,
           responseTime: 0,
+          responseSize: undefined,
         });
         throw new StatusCodeError(
           `Digest auth failed, expected 401 status code, but received ${first401Result.status} in the first response`
@@ -330,6 +333,7 @@ export class ApiFetcher implements IFetcher {
           path: pathWithSearchParams || '',
           statusCode: first401Result.status,
           responseTime: 0,
+          responseSize: undefined,
         });
         throw new UnexpectedError(
           'Digest auth failed, no www-authenticate header received in the first response'
@@ -435,6 +439,21 @@ export class ApiFetcher implements IFetcher {
       ctx.secretsSet.add(secretItem);
     }
 
+    let responseSize: number | undefined;
+    const contentLength = fetchResult.headers.get('content-length');
+
+    if (contentLength && !isNaN(+contentLength)) {
+      responseSize = +contentLength;
+    } else {
+      if (responseBody instanceof ArrayBuffer) {
+        responseSize = responseBody.byteLength;
+      } else if (typeof responseBody === 'string') {
+        responseSize = new TextEncoder().encode(responseBody).length;
+      } else {
+        responseSize = undefined;
+      }
+    }
+
     this.initVerboseResponseLogs({
       body: isJsonContentType(responseContentType)
         ? JSON.stringify(maskedResponseBody)
@@ -449,6 +468,7 @@ export class ApiFetcher implements IFetcher {
         noSecretsMasking: ctx.noSecretsMasking,
         secretsSet: ctx.secretsSet,
       }),
+      responseSize,
     });
 
     return {
@@ -458,6 +478,7 @@ export class ApiFetcher implements IFetcher {
       header: Object.fromEntries(fetchResult.headers?.entries() || []),
       contentType: responseContentType,
       requestUrl: urlToFetch,
+      responseSize,
     };
   };
 }