diff --git src/wp-content/themes/twentyfifteen/css/editor-style.css src/wp-content/themes/twentyfifteen/css/editor-style.css
index 16d4e93592..63da717621 100644
--- src/wp-content/themes/twentyfifteen/css/editor-style.css
+++ src/wp-content/themes/twentyfifteen/css/editor-style.css
@@ -287,7 +287,6 @@ table th,
 table caption {
 	border-width: 0 1px 1px 0;
 	font-family: "Noto Serif", serif;
-	font-size: 17px;
 	font-weight: 700;
 	padding: 7px;
 	text-align: left;
@@ -298,7 +297,6 @@ table td,
 .mce-item-table td {
 	border-width: 0 1px 1px 0;
 	font-family: "Noto Serif", serif;
-	font-size: 17px;
 	padding: 7px;
 	vertical-align: baseline;
 }