diff --git a/packages/react-native/Libraries/ReactNative/UIManager.js b/packages/react-native/Libraries/ReactNative/UIManager.js
index d9d5440729634d..e830b96971891a 100644
--- a/packages/react-native/Libraries/ReactNative/UIManager.js
+++ b/packages/react-native/Libraries/ReactNative/UIManager.js
@@ -9,7 +9,6 @@
  */
 
 import type {RootTag} from '../Types/RootTagTypes';
-import type {Spec as FabricUIManagerSpec} from './FabricUIManager';
 import type {Spec} from './NativeUIManager';
 
 import {getFabricUIManager} from './FabricUIManager';
diff --git a/packages/rn-tester/NativeComponentExample/ios/RNTMyLegacyNativeViewManager.mm b/packages/rn-tester/NativeComponentExample/ios/RNTMyLegacyNativeViewManager.mm
index fb5cdf809f233e..2125e36313f678 100644
--- a/packages/rn-tester/NativeComponentExample/ios/RNTMyLegacyNativeViewManager.mm
+++ b/packages/rn-tester/NativeComponentExample/ios/RNTMyLegacyNativeViewManager.mm
@@ -30,6 +30,13 @@ + (BOOL)requiresMainQueueSetup
 
 RCT_EXPORT_VIEW_PROPERTY(onColorChanged, RCTBubblingEventBlock)
 
+RCT_CUSTOM_VIEW_PROPERTY(cornerRadius, CGFloat, RNTLegacyView)
+{
+  view.clipsToBounds = true;
+  NSNumber *cornerRadius = (NSNumber *)json;
+  view.layer.cornerRadius = [cornerRadius floatValue];
+}
+
 RCT_EXPORT_METHOD(changeBackgroundColor : (nonnull NSNumber *)reactTag color : (NSString *)color)
 {
   [self.bridge.uiManager addUIBlock:^(RCTUIManager *uiManager, NSDictionary<NSNumber *, UIView *> *viewRegistry) {
diff --git a/packages/rn-tester/NativeComponentExample/js/MyNativeView.js b/packages/rn-tester/NativeComponentExample/js/MyNativeView.js
index 65e5924fb01022..2f5ed092a21532 100644
--- a/packages/rn-tester/NativeComponentExample/js/MyNativeView.js
+++ b/packages/rn-tester/NativeComponentExample/js/MyNativeView.js
@@ -27,6 +27,8 @@ const colors = [
   '#000033',
 ];
 
+const cornerRadiuses = [0, 20, 40, 60, 80, 100, 120];
+
 class HSBA {
   hue: number;
   saturation: number;
@@ -50,14 +52,51 @@ class HSBA {
   }
 }
 
+function beautify(number: number): string {
+  if (number % 1 === 0) {
+    return number.toFixed();
+  }
+  return number.toFixed(2);
+}
+
+type MeasureStruct = {
+  x: number,
+  y: number,
+  width: number,
+  height: number,
+};
+
+const MeasureStructZero: MeasureStruct = {
+  x: 0,
+  y: 0,
+  width: 0,
+  height: 0,
+};
+
+function getTextFor(measureStruct: MeasureStruct): string {
+  return `x: ${beautify(measureStruct.x)}, y: ${beautify(
+    measureStruct.y,
+  )}, width: ${beautify(measureStruct.width)}, height: ${beautify(
+    measureStruct.height,
+  )}`;
+}
+
 // This is an example component that migrates to use the new architecture.
 export default function MyNativeView(props: {}): React.Node {
+  const containerRef = useRef<typeof View | null>(null);
   const ref = useRef<React.ElementRef<MyNativeViewType> | null>(null);
   const legacyRef = useRef<React.ElementRef<MyLegacyViewType> | null>(null);
   const [opacity, setOpacity] = useState(1.0);
   const [hsba, setHsba] = useState<HSBA>(new HSBA());
+  const [cornerRadiusIndex, setCornerRadiusIndex] = useState<number>(0);
+  const [legacyMeasure, setLegacyMeasure] =
+    useState<MeasureStruct>(MeasureStructZero);
+  const [legacyMeasureInWindow, setLegacyMeasureInWindow] =
+    useState<MeasureStruct>(MeasureStructZero);
+  const [legacyMeasureLayout, setLegacyMeasureLayout] =
+    useState<MeasureStruct>(MeasureStructZero);
   return (
-    <View style={{flex: 1}}>
+    <View ref={containerRef} style={{flex: 1}}>
       <Text style={{color: 'red'}}>Fabric View</Text>
       <RNTMyNativeView ref={ref} style={{flex: 1}} opacity={opacity} />
       <Text style={{color: 'red'}}>Legacy View</Text>
@@ -76,8 +115,10 @@ export default function MyNativeView(props: {}): React.Node {
           )
         }
       />
-      <Text style={{color: 'green'}}>HSBA: {hsba.toString()}</Text>
-      <Text style={{color: 'green'}}>
+      <Text style={{color: 'green', textAlign: 'center'}}>
+        HSBA: {hsba.toString()}
+      </Text>
+      <Text style={{color: 'green', textAlign: 'center'}}>
         Constants From Interop Layer:{' '}
         {UIManager.RNTMyLegacyNativeView.Constants.PI}
       </Text>
@@ -106,6 +147,49 @@ export default function MyNativeView(props: {}): React.Node {
           ref.current?.measure((x, y, width, height) => {
             console.log(x, y, width, height);
           });
+
+          legacyRef.current?.measure((x, y, width, height) => {
+            setLegacyMeasure({x, y, width, height});
+          });
+          legacyRef.current?.measureInWindow((x, y, width, height) => {
+            setLegacyMeasureInWindow({x, y, width, height});
+          });
+
+          if (containerRef.current) {
+            legacyRef.current?.measureLayout(
+              // $FlowFixMe[incompatible-call]
+              containerRef.current,
+              (x, y, width, height) => {
+                setLegacyMeasureLayout({x, y, width, height});
+              },
+            );
+          }
+        }}
+      />
+
+      <Text style={{textAlign: 'center'}}>
+        &gt; Interop Layer Measurements &lt;
+      </Text>
+      <Text style={{textAlign: 'center'}}>
+        measure {getTextFor(legacyMeasure)}
+      </Text>
+      <Text style={{textAlign: 'center'}}>
+        InWindow {getTextFor(legacyMeasureInWindow)}
+      </Text>
+      <Text style={{textAlign: 'center'}}>
+        InLayout {getTextFor(legacyMeasureLayout)}
+      </Text>
+      <Button
+        title="Test setNativeProps"
+        onPress={() => {
+          const newCRIndex =
+            cornerRadiusIndex + 1 >= cornerRadiuses.length
+              ? 0
+              : cornerRadiusIndex + 1;
+          setCornerRadiusIndex(newCRIndex);
+          legacyRef.current?.setNativeProps({
+            cornerRadius: cornerRadiuses[newCRIndex],
+          });
         }}
       />
     </View>