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 b8c340365c10b..30bf5b2ed377e 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
@@ -41,15 +41,10 @@
         "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 3e0c454cbdaf8..70d4a58f9edd7 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
@@ -41,15 +41,10 @@
         "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 30c8384566824..0c80a83ed9c23 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
@@ -41,15 +41,10 @@
         "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 54cb19d47b4a9..52f70e15d44e9 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
@@ -42,15 +42,10 @@
         "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 92c2634a81d30..eb9d6140537be 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
@@ -42,15 +42,10 @@
         "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 8b083bc2c05da..9111f9117c007 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
@@ -53,15 +53,10 @@
         "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 acad34af804b7..babc30bb673c9 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
@@ -25,15 +25,10 @@
         "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 7f826cfcc0533..6856f0642d8fa 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
@@ -46,15 +46,10 @@
         "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 80205f1bfbe22..12b5333c16c05 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
@@ -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.shards.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.shards.json
index d82633db74a02..3dbd75852625d 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
@@ -41,15 +41,10 @@
         "description":"The unit in which to display byte values",
         "options":[
           "b",
-          "k",
           "kb",
-          "m",
           "mb",
-          "g",
           "gb",
-          "t",
           "tb",
-          "p",
           "pb"
         ]
       },