diff --git a/src/wp-content/themes/twentynineteen/style-editor.css b/src/wp-content/themes/twentynineteen/style-editor.css
index 0dbf12385a..edc4faa3dc 100644
--- a/src/wp-content/themes/twentynineteen/style-editor.css
+++ b/src/wp-content/themes/twentynineteen/style-editor.css
@@ -598,7 +598,7 @@ body .wp-block[data-align="full"] {
 }
 
 .wp-block .wp-block {
-  width: 100%;
+  width: initial;
 }
 
 /** === Base Typography === */
diff --git a/src/wp-content/themes/twentynineteen/style-editor.scss b/src/wp-content/themes/twentynineteen/style-editor.scss
index b5c422fa72..921d0880de 100644
--- a/src/wp-content/themes/twentynineteen/style-editor.scss
+++ b/src/wp-content/themes/twentynineteen/style-editor.scss
@@ -62,7 +62,7 @@ body {
 
 	// Only the top level blocks need specific widths, therefore override for every nested block.
 	.wp-block {
-		width: 100%;
+		width: initial;
 	}
 }