Index: wp-admin/css/forms-rtl.css
===================================================================
--- wp-admin/css/forms-rtl.css	(revision 46598)
+++ wp-admin/css/forms-rtl.css	(working copy)
@@ -1356,8 +1356,8 @@
 
 	input[type="radio"],
 	input[type="checkbox"] {
-		height: 1.5625rem;
-		width: 1.5625rem;
+		height: 1.4rem;
+		width: 1.4rem;
 	}
 
 	.wp-admin p input[type="checkbox"],
Index: wp-admin/css/forms.css
===================================================================
--- wp-admin/css/forms.css	(revision 46598)
+++ wp-admin/css/forms.css	(working copy)
@@ -1355,8 +1355,8 @@
 
 	input[type="radio"],
 	input[type="checkbox"] {
-		height: 1.5625rem;
-		width: 1.5625rem;
+		height: 1.4rem;
+		width: 1.4rem;
 	}
 
 	.wp-admin p input[type="checkbox"],