Index: wp-admin/css/customize-widgets.css
===================================================================
--- wp-admin/css/customize-widgets.css	(revision 27836)
+++ wp-admin/css/customize-widgets.css	(working copy)
@@ -170,7 +170,7 @@
 	right: 0;
 	width: 100%;
 	height: 100%;
-	font: normal 20px/1 'dashicons';
+	font: normal 20px/43px 'dashicons';
 	text-align: center;
 	text-indent: 0;
 	-webkit-font-smoothing: antialiased;
@@ -312,7 +312,7 @@
 	position: relative;
 	left: -2px;
 	top: -1px;
-	font: normal 16px/1 'dashicons';
+	font: normal 20px/1 'dashicons';
 	vertical-align: middle;
 	-webkit-transition: all 0.2s;
 	transition: all 0.2s;