Index: src/wp-content/themes/twentyfifteen/style.css
===================================================================
--- src/wp-content/themes/twentyfifteen/style.css	(revision 49988)
+++ src/wp-content/themes/twentyfifteen/style.css	(working copy)
@@ -3373,12 +3373,19 @@
 	}
 
 	.entry-content h5,
+	.entry-summary h5,
+	.page-content h5,
+	.comment-content h5 {
+		font-size: 18px;
+		font-size: 1.8rem;
+		line-height: 1.2353;
+		margin-top: 3.2941em;
+		margin-bottom: 1.6471em;
+	}
+
 	.entry-content h6,
-	.entry-summary h5,
 	.entry-summary h6,
-	.page-content h5,
 	.page-content h6,
-	.comment-content h5,
 	.comment-content h6 {
 		font-size: 17px;
 		font-size: 1.7rem;
@@ -3947,12 +3954,19 @@
 	}
 
 	.entry-content h5,
+	.entry-summary h5,
+	.page-content h5,
+	.comment-content h5 {
+		font-size: 20px;
+		font-size: 2rem;
+		line-height: 1.2632;
+		margin-top: 3.3684em;
+		margin-bottom: 1.6842em;
+	}
+
 	.entry-content h6,
-	.entry-summary h5,
 	.entry-summary h6,
-	.page-content h5,
 	.page-content h6,
-	.comment-content h5,
 	.comment-content h6 {
 		font-size: 19px;
 		font-size: 1.9rem;
@@ -4620,12 +4634,19 @@
 	}
 
 	.entry-content h5,
+	.entry-summary h5,
+	.page-content h5,
+	.comment-content h5 {
+		font-size: 16px;
+		font-size: 1.6rem;
+		line-height: 1.2;
+		margin-top: 3.2em;
+		margin-bottom: 1.6em;
+	}
+
 	.entry-content h6,
-	.entry-summary h5,
 	.entry-summary h6,
-	.page-content h5,
 	.page-content h6,
-	.comment-content h5,
 	.comment-content h6 {
 		font-size: 15px;
 		font-size: 1.5rem;
@@ -5203,12 +5224,19 @@
 	}
 
 	.entry-content h5,
+	.entry-summary h5,
+	.page-content h5,
+	.comment-content h5 {
+		font-size: 18px;
+		font-size: 1.8rem;
+		line-height: 1.2353;
+		margin-top: 3.2941em;
+		margin-bottom: 1.6471em;
+	}
+
 	.entry-content h6,
-	.entry-summary h5,
 	.entry-summary h6,
-	.page-content h5,
 	.page-content h6,
-	.comment-content h5,
 	.comment-content h6 {
 		font-size: 17px;
 		font-size: 1.7rem;
@@ -5758,12 +5786,19 @@
 	}
 
 	.entry-content h5,
+	.entry-summary h5,
+	.page-content h5,
+	.comment-content h5 {
+		font-size: 20px;
+		font-size: 2rem;
+		line-height: 1.2632;
+		margin-top: 3.3684em;
+		margin-bottom: 1.6842em;
+	}
+
 	.entry-content h6,
-	.entry-summary h5,
 	.entry-summary h6,
-	.page-content h5,
 	.page-content h6,
-	.comment-content h5,
 	.comment-content h6 {
 		font-size: 19px;
 		font-size: 1.9rem;