diff --git a/http/headers/Accept-CH.json b/http/headers/Accept-CH.json
index 55608e3981a5df..1f4ef76cdf54c1 100644
--- a/http/headers/Accept-CH.json
+++ b/http/headers/Accept-CH.json
@@ -492,6 +492,38 @@
             }
           }
         },
+        "Sec-CH-Width": {
+          "__compat": {
+            "description": "`Sec-CH-Width` token",
+            "spec_url": "https://wicg.github.io/responsive-image-client-hints/#sec-ch-width",
+            "support": {
+              "chrome": {
+                "version_added": "97"
+              },
+              "chrome_android": "mirror",
+              "edge": "mirror",
+              "firefox": {
+                "version_added": false
+              },
+              "firefox_android": "mirror",
+              "oculus": "mirror",
+              "opera": "mirror",
+              "opera_android": "mirror",
+              "safari": {
+                "version_added": false
+              },
+              "safari_ios": "mirror",
+              "samsunginternet_android": "mirror",
+              "webview_android": "mirror",
+              "webview_ios": "mirror"
+            },
+            "status": {
+              "experimental": true,
+              "standard_track": true,
+              "deprecated": false
+            }
+          }
+        },
         "Viewport-Width": {
           "__compat": {
             "description": "`Viewport-Width` token",
diff --git a/http/headers/Sec-CH-Width.json b/http/headers/Sec-CH-Width.json
new file mode 100644
index 00000000000000..1caacb9a873f2f
--- /dev/null
+++ b/http/headers/Sec-CH-Width.json
@@ -0,0 +1,44 @@
+{
+  "http": {
+    "headers": {
+      "Sec-CH-Width": {
+        "__compat": {
+          "description": "`Sec-CH-Width` request header",
+          "spec_url": "https://wicg.github.io/responsive-image-client-hints/#sec-ch-width",
+          "support": {
+            "chrome": [
+              {
+                "version_added": "97"
+              },
+              {
+                "alternative_name": "Width",
+                "version_added": "46"
+              }
+            ],
+            "chrome_android": "mirror",
+            "edge": "mirror",
+            "firefox": {
+              "version_added": false
+            },
+            "firefox_android": "mirror",
+            "oculus": "mirror",
+            "opera": "mirror",
+            "opera_android": "mirror",
+            "safari": {
+              "version_added": false
+            },
+            "safari_ios": "mirror",
+            "samsunginternet_android": "mirror",
+            "webview_android": "mirror",
+            "webview_ios": "mirror"
+          },
+          "status": {
+            "experimental": true,
+            "standard_track": true,
+            "deprecated": false
+          }
+        }
+      }
+    }
+  }
+}