Index: wp-includes/css/buttons.css
===================================================================
--- wp-includes/css/buttons.css	(revision 44737)
+++ wp-includes/css/buttons.css	(working copy)
@@ -46,7 +46,7 @@
 	display: inline-block;
 	text-decoration: none;
 	font-size: 13px;
-	line-height: 26px;
+	line-height: 2;
 	height: 28px;
 	margin: 0;
 	padding: 0 10px 1px;
@@ -72,14 +72,14 @@
 .wp-core-ui .button.button-large,
 .wp-core-ui .button-group.button-large .button {
 	height: 30px;
-	line-height: 28px;
+	line-height: 2.1;
 	padding: 0 12px 2px;
 }
 
 .wp-core-ui .button.button-small,
 .wp-core-ui .button-group.button-small .button {
 	height: 24px;
-	line-height: 22px;
+	line-height: 2;
 	padding: 0 8px 1px;
 	font-size: 11px;
 }
@@ -88,7 +88,7 @@
 .wp-core-ui .button-group.button-hero .button {
 	font-size: 14px;
 	height: 46px;
-	line-height: 44px;
+	line-height: 3.15;
 	padding: 0 36px;
 }
 
@@ -376,7 +376,7 @@
 	.wp-core-ui.wp-customizer .button {
 		padding: 0 10px 1px;
 		font-size: 13px;
-		line-height: 26px;
+		line-height: 2;
 		height: 28px;
 		margin: 0;
 		vertical-align: inherit;
@@ -391,7 +391,7 @@
 
 	.interim-login .button.button-large {
 		height: 30px;
-		line-height: 28px;
+		line-height: 2;
 		padding: 0 12px 2px;
 	}