diff --git a/Libraries/Utilities/PixelRatio.js.flow b/Libraries/Utilities/PixelRatio.js.flow
new file mode 100644
index 00000000000..b39952514b4
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+++ b/Libraries/Utilities/PixelRatio.js.flow
@@ -0,0 +1,21 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ * @flow strict-local
+ */
+
+'use strict';
+
+declare class PixelRatio {
+  static get(): number;
+  static getFontScale(): number;
+  static getPixelSizeForLayoutSize(layoutSize: number): number;
+  static roundToNearestPixel(layoutSize: number): number;
+  static startDetecting(): void;
+}
+
+module.exports = PixelRatio;