diff --git a/packages/block-library/src/accordion/style.scss b/packages/block-library/src/accordion/style.scss
new file mode 100644
index 00000000000000..289f6d305c52c5
--- /dev/null
+++ b/packages/block-library/src/accordion/style.scss
@@ -0,0 +1,4 @@
+.wp-block-accordion {
+	// This block has customizable padding, border-box makes that more predictable.
+	box-sizing: border-box;
+}
diff --git a/packages/block-library/src/style.scss b/packages/block-library/src/style.scss
index 907c7105467259..32af44c9bea54d 100644
--- a/packages/block-library/src/style.scss
+++ b/packages/block-library/src/style.scss
@@ -1,3 +1,4 @@
+@use "./accordion/style.scss" as *;
 @use "./accordion-item/style.scss" as *;
 @use "./accordion-heading/style.scss" as *;
 @use "./accordion-panel/style.scss" as *;