diff --git a/packages/block-library/src/post-template/editor.scss b/packages/block-library/src/post-template/editor.scss
index 7b426b0f3d37a..ccf54a2d9a76a 100644
--- a/packages/block-library/src/post-template/editor.scss
+++ b/packages/block-library/src/post-template/editor.scss
@@ -4,4 +4,11 @@
 		margin-left: 0;
 		list-style: none;
 	}
+
+	.wp-block-post-template {
+		.is-root-container {
+			padding-left: 0;
+			padding-right: 0;
+		}
+	}
 }
diff --git a/packages/block-library/src/post-template/style.scss b/packages/block-library/src/post-template/style.scss
index cc7a47ddf2b2a..373fab9a16761 100644
--- a/packages/block-library/src/post-template/style.scss
+++ b/packages/block-library/src/post-template/style.scss
@@ -19,24 +19,18 @@
 		flex-direction: row;
 		display: flex;
 		flex-wrap: wrap;
-
+		gap: 1.25em;
 		li {
-			margin: 0 0 1.25em 0;
-			width: 100%;
+			flex: 1;
+			min-width: 250px;
+			margin: 0;
 		}
 
-		@include break-small {
-			li {
-				margin-right: 1.25em;
-			}
-
+		@include break-xlarge {
 			@for $i from 2 through 6 {
 				&.is-flex-container.columns-#{ $i } > li {
 					width: calc((100% / #{ $i }) - 1.25em + (1.25em / #{ $i }));
-
-					&:nth-child( #{ $i }n ) {
-						margin-right: 0;
-					}
+					flex: none;
 				}
 			}
 		}