diff --git a/src/modal-checkout/modal.scss b/src/modal-checkout/modal.scss
index 6d73a19e3..99948f4c8 100644
--- a/src/modal-checkout/modal.scss
+++ b/src/modal-checkout/modal.scss
@@ -5,10 +5,10 @@
 .newspack-ui {
 	iframe[name="newspack_modal_checkout_iframe"] {
 		border: none;
-		height: calc(100% + var(--newspack-ui-spacer-8, 48px));
+		height: calc(100% + var(--newspack-ui-spacer-9, 48px));
 		margin: calc(-1 * var(--newspack-ui-spacer-5, 24px));
 		max-width: unset;
-		width: calc(100% + var(--newspack-ui-spacer-8, 48px));
+		width: calc(100% + var(--newspack-ui-spacer-9, 48px));
 	}
 }