From f438be7d60c467eccb0d91219697e05ebf612bb9 Mon Sep 17 00:00:00 2001
From: William Schurman <wschurman@gmail.com>
Date: Sat, 3 Jun 2017 12:22:10 -0700
Subject: [PATCH] Correct sizing of header back button image on iOS (#1687)

---
 packages/react-navigation/src/views/HeaderBackButton.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

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,