diff --git a/xwords4/android/XWords4/res/values-large/styles.xml b/xwords4/android/XWords4/res/values-large/styles.xml
new file mode 100644
index 000000000..431defd90
--- /dev/null
+++ b/xwords4/android/XWords4/res/values-large/styles.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+  <style name="toolbar_button">
+    <item name="android:layout_width">64dp</item>
+    <item name="android:layout_height">64dp</item>
+    <item name="android:layout_weight">1</item>
+  </style>
+</resources>
diff --git a/xwords4/android/XWords4/res/values-xlarge/styles.xml b/xwords4/android/XWords4/res/values-xlarge/styles.xml
new file mode 100644
index 000000000..77167324f
--- /dev/null
+++ b/xwords4/android/XWords4/res/values-xlarge/styles.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+  <style name="toolbar_button">
+    <item name="android:layout_width">72dp</item>
+    <item name="android:layout_height">72dp</item>
+    <item name="android:layout_weight">1</item>
+  </style>
+</resources>