diff --git a/css/properties/box-sizing.json b/css/properties/box-sizing.json
index 00d5c82af7cb1d..4fff48eb27258a 100644
--- a/css/properties/box-sizing.json
+++ b/css/properties/box-sizing.json
@@ -86,6 +86,70 @@
             "deprecated": false
           }
         },
+        "border-box": {
+          "__compat": {
+            "support": {
+              "chrome": {
+                "version_added": "1"
+              },
+              "chrome_android": "mirror",
+              "edge": "mirror",
+              "firefox": {
+                "version_added": "1"
+              },
+              "firefox_android": "mirror",
+              "ie": {
+                "version_added": false
+              },
+              "oculus": "mirror",
+              "opera": "mirror",
+              "opera_android": "mirror",
+              "safari": {
+                "version_added": "3"
+              },
+              "safari_ios": "mirror",
+              "samsunginternet_android": "mirror",
+              "webview_android": "mirror"
+            },
+            "status": {
+              "experimental": false,
+              "standard_track": true,
+              "deprecated": false
+            }
+          }
+        },
+        "content-box": {
+          "__compat": {
+            "support": {
+              "chrome": {
+                "version_added": "1"
+              },
+              "chrome_android": "mirror",
+              "edge": "mirror",
+              "firefox": {
+                "version_added": "1"
+              },
+              "firefox_android": "mirror",
+              "ie": {
+                "version_added": false
+              },
+              "oculus": "mirror",
+              "opera": "mirror",
+              "opera_android": "mirror",
+              "safari": {
+                "version_added": "3"
+              },
+              "safari_ios": "mirror",
+              "samsunginternet_android": "mirror",
+              "webview_android": "mirror"
+            },
+            "status": {
+              "experimental": false,
+              "standard_track": true,
+              "deprecated": false
+            }
+          }
+        },
         "padding-box": {
           "__compat": {
             "description": "<code>padding-box</code>",