diff --git a/packages/react-navigation/src/views/HeaderBackButton.js b/packages/react-navigation/src/views/HeaderBackButton.js
index 81fd72a6..143b6a5d 100644
--- a/packages/react-navigation/src/views/HeaderBackButton.js
+++ b/packages/react-navigation/src/views/HeaderBackButton.js
@@ -118,8 +118,8 @@ const styles = StyleSheet.create({
   },
   icon: Platform.OS === 'ios'
     ? {
-        height: 20,
-        width: 12,
+        height: 21,
+        width: 13,
         marginLeft: 10,
         marginRight: 22,
         marginVertical: 12,