diff --git a/packages/block-library/src/code/style.scss b/packages/block-library/src/code/style.scss
index e8d3b07cd034fa..670a4f7f1ef4c8 100644
--- a/packages/block-library/src/code/style.scss
+++ b/packages/block-library/src/code/style.scss
@@ -1,8 +1,13 @@
-// Provide a minimum of overflow handling and ensure the code markup inherits
-// the font-family set on pre.
-.wp-block-code code {
-	display: block;
-	font-family: inherit;
-	overflow-wrap: break-word;
-	white-space: pre-wrap;
+.wp-block-code {
+	// This block has customizable padding, border-box makes that more predictable.
+	box-sizing: border-box;
+
+	// Provide a minimum of overflow handling and ensure the code markup inherits
+	// the font-family set on pre.
+	code {
+		display: block;
+		font-family: inherit;
+		overflow-wrap: break-word;
+		white-space: pre-wrap;
+	}
 }