Index: src/wp-admin/css/nav-menus.css
===================================================================
--- src/wp-admin/css/nav-menus.css	(revision 31521)
+++ src/wp-admin/css/nav-menus.css	(working copy)
@@ -836,6 +836,12 @@
 		width: 100%;
 	}
 
+	.menu-item-settings input[type="checkbox"],
+	.menu-item-settings input[type="radio"] {
+		width: 25px;
+		height: 25px;
+	}
+
 	.menu-settings dl {
 		padding-left: 0;
 	}