Index: wp-content/themes/twentynineteen/style-editor.css
===================================================================
--- wp-content/themes/twentynineteen/style-editor.css	(revision 54300)
+++ wp-content/themes/twentynineteen/style-editor.css	(working copy)
@@ -621,10 +621,10 @@
   }
   body .wp-block[data-align="full"],
   body .wp-block.alignfull {
-    width: calc(125% + 16px);
-    max-width: calc(125% + 16px);
-    position: relative;
-    left: -12.5%;
+      width: calc(100% + 16px);
+			max-width: calc(100% + 16px);
+			position: relative;
+			left: 0%;
   }
   body .wp-block[data-align="wide"] .wp-block[data-align="full"],
   body .wp-block[data-align="full"] .wp-block[data-align="full"],
Index: wp-content/themes/twentynineteen/style-editor.scss
===================================================================
--- wp-content/themes/twentynineteen/style-editor.scss	(revision 54300)
+++ wp-content/themes/twentynineteen/style-editor.scss	(working copy)
@@ -55,10 +55,10 @@
 
 		.wp-block[data-align="full"],
 		.wp-block.alignfull {
-			width: calc(125% + 16px);
-			max-width: calc(125% + 16px);
+			width: calc(100% + 16px);
+			max-width: calc(100% + 16px);
 			position: relative;
-			left: -12.5%;
+			left: 0%;
 		}
 
 		.wp-block[data-align="wide"] .wp-block[data-align="full"],