diff --git a/packages/block-library/src/latest-comments/style.scss b/packages/block-library/src/latest-comments/style.scss
index ec93998eb97fd7..5bb22abf5a5aa8 100644
--- a/packages/block-library/src/latest-comments/style.scss
+++ b/packages/block-library/src/latest-comments/style.scss
@@ -1,3 +1,8 @@
+.wp-block-latest-comments {
+	// This block has customizable border, border-box makes that more predictable.
+	box-sizing: border-box;
+}
+
 // Lower specificity - target list element.
 ol.wp-block-latest-comments {
 	// Removes left spacing in Customizer Widgets screen.
@@ -34,7 +39,6 @@ ol.wp-block-latest-comments {
 	// The following styles are to prevent duplicate border for the latest comments.
 	border: none;
 	border-radius: inherit;
-	box-sizing: border-box;
 }
 
 .wp-block-latest-comments__comment {