diff --git a/packages/block-library/src/page-list/style.scss b/packages/block-library/src/page-list/style.scss
index d06a6142573bec..ab04d57e61b965 100644
--- a/packages/block-library/src/page-list/style.scss
+++ b/packages/block-library/src/page-list/style.scss
@@ -15,3 +15,7 @@
 		background-color: inherit;
 	}
 }
+.wp-block-page-list {
+	// This block has customizable padding, border-box makes that more predictable.
+	box-sizing: border-box;
+}