diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.allocation.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.allocation.json
index d373fa8b36114..7126b3148e773 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.allocation.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.allocation.json
@@ -44,15 +44,10 @@
         "description": "The unit in which to display byte values",
         "options": [
           "b",
-          "k",
           "kb",
-          "m",
           "mb",
-          "g",
           "gb",
-          "t",
           "tb",
-          "p",
           "pb"
         ]
       },
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.fielddata.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.fielddata.json
index 4a43bbdf30a40..4fba00e81fdec 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.fielddata.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.fielddata.json
@@ -44,15 +44,10 @@
         "description": "The unit in which to display byte values",
         "options": [
           "b",
-          "k",
           "kb",
-          "m",
           "mb",
-          "g",
           "gb",
-          "t",
           "tb",
-          "p",
           "pb"
         ]
       },
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.indices.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.indices.json
index 157b742096f04..ab02bd205c8da 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.indices.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.indices.json
@@ -44,15 +44,10 @@
         "description": "The unit in which to display byte values",
         "options": [
           "b",
-          "k",
           "kb",
-          "m",
           "mb",
-          "g",
           "gb",
-          "t",
           "tb",
-          "p",
           "pb"
         ]
       },
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.ml_data_frame_analytics.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.ml_data_frame_analytics.json
index 42971490b98fa..c342fb86e4c2f 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.ml_data_frame_analytics.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.ml_data_frame_analytics.json
@@ -45,15 +45,10 @@
         "description": "The unit in which to display byte values",
         "options": [
           "b",
-          "k",
           "kb",
-          "m",
           "mb",
-          "g",
           "gb",
-          "t",
           "tb",
-          "p",
           "pb"
         ]
       },
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.ml_jobs.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.ml_jobs.json
index ffeb53c375e0f..95024190d8f25 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.ml_jobs.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.ml_jobs.json
@@ -45,15 +45,10 @@
         "description": "The unit in which to display byte values",
         "options": [
           "b",
-          "k",
           "kb",
-          "m",
           "mb",
-          "g",
           "gb",
-          "t",
           "tb",
-          "p",
           "pb"
         ]
       },
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.ml_trained_models.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.ml_trained_models.json
index 7e04a7138adbc..c5530934c897e 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.ml_trained_models.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.ml_trained_models.json
@@ -56,15 +56,10 @@
         "description": "The unit in which to display byte values",
         "options": [
           "b",
-          "k",
           "kb",
-          "m",
           "mb",
-          "g",
           "gb",
-          "t",
           "tb",
-          "p",
           "pb"
         ]
       },
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.nodes.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.nodes.json
index 14ee0cc632350..a1c1626157b34 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.nodes.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.nodes.json
@@ -28,15 +28,10 @@
         "description": "The unit in which to display byte values",
         "options": [
           "b",
-          "k",
           "kb",
-          "m",
           "mb",
-          "g",
           "gb",
-          "t",
           "tb",
-          "p",
           "pb"
         ]
       },
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.recovery.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.recovery.json
index b01defb8400d2..702777749563b 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.recovery.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.recovery.json
@@ -49,15 +49,10 @@
         "description": "The unit in which to display byte values",
         "options": [
           "b",
-          "k",
           "kb",
-          "m",
           "mb",
-          "g",
           "gb",
-          "t",
           "tb",
-          "p",
           "pb"
         ]
       },
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.segments.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.segments.json
index 997408b7e6d53..a9a2019e7e19e 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.segments.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.segments.json
@@ -52,15 +52,10 @@
         "description": "The unit in which to display byte values",
         "options": [
           "b",
-          "k",
           "kb",
-          "m",
           "mb",
-          "g",
           "gb",
-          "t",
           "tb",
-          "p",
           "pb"
         ]
       },
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.shards.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.shards.json
index 78ed6be27df0d..4f5802722b6a8 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.shards.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.shards.json
@@ -44,15 +44,10 @@
         "description": "The unit in which to display byte values",
         "options": [
           "b",
-          "k",
           "kb",
-          "m",
           "mb",
-          "g",
           "gb",
-          "t",
           "tb",
-          "p",
           "pb"
         ]
       },