diff --git a/packages/block-library/src/template-part/editor.scss b/packages/block-library/src/template-part/editor.scss
index 44690f049b6348..8c7fbc4ff05d3c 100644
--- a/packages/block-library/src/template-part/editor.scss
+++ b/packages/block-library/src/template-part/editor.scss
@@ -20,7 +20,7 @@
 		cursor: pointer;
 		margin-top: $grid-unit-20;
 		transition: all 0.05s ease-in-out;
-		border: $border-width solid transparent;
+		border: $border-width solid $gray-300;
 		width: 100%;
 		background-color: $white;
 
@@ -38,6 +38,10 @@
 		&.is-placeholder {
 			min-height: 100px;
 		}
+
+		.block-editor-block-preview__container {
+			border-bottom: $border-width solid $gray-300;
+		}
 	}
 
 	.wp-block-template-part__selection-preview-item-title {