diff --git a/mathml/global_attributes.json b/mathml/global_attributes.json
index ef3027cfaa4cb..cdd6e8e1fa38b 100644
--- a/mathml/global_attributes.json
+++ b/mathml/global_attributes.json
@@ -268,10 +268,7 @@
               "version_added": "5",
               "impl_url": "https://trac.webkit.org/changeset/63079"
             },
-            "safari_ios": {
-              "version_added": "4",
-              "impl_url": "https://trac.webkit.org/changeset/63079"
-            },
+            "safari_ios": "mirror",
             "samsunginternet_android": "mirror",
             "webview_android": "mirror"
           },
@@ -280,6 +277,42 @@
             "standard_track": true,
             "deprecated": true
           }
+        },
+        "small_normal_big": {
+          "__compat": {
+            "description": "<code>small</code>, <code>normal</code>, <code>big</code> values",
+            "support": {
+              "chrome": {
+                "version_added": false
+              },
+              "chrome_android": "mirror",
+              "edge": "mirror",
+              "firefox": {
+                "version_added": "70",
+                "version_removed": "83"
+              },
+              "firefox_android": "mirror",
+              "ie": {
+                "version_added": false
+              },
+              "oculus": "mirror",
+              "opera": {
+                "version_added": false
+              },
+              "opera_android": "mirror",
+              "safari": {
+                "version_added": "5"
+              },
+              "safari_ios": "mirror",
+              "samsunginternet_android": "mirror",
+              "webview_android": "mirror"
+            },
+            "status": {
+              "experimental": false,
+              "standard_track": true,
+              "deprecated": true
+            }
+          }
         }
       },
       "mathvariant": {