diff --git a/packages/edit-site/src/components/style-book/constants.ts b/packages/edit-site/src/components/style-book/constants.ts
index 6af8f21e0706fe..84fb06f33c743e 100644
--- a/packages/edit-site/src/components/style-book/constants.ts
+++ b/packages/edit-site/src/components/style-book/constants.ts
@@ -252,7 +252,7 @@ export const STYLE_BOOK_IFRAME_STYLES = `
 	}
 
 	.edit-site-style-book__example-preview {
-		width: 100%;
+		width: calc(100% - 120px);
 	}
 
 	.edit-site-style-book__example-preview .block-editor-block-list__insertion-point,
diff --git a/packages/edit-site/src/components/style-book/examples.tsx b/packages/edit-site/src/components/style-book/examples.tsx
index f26f283ffa4477..fdd00e7aba3e9f 100644
--- a/packages/edit-site/src/components/style-book/examples.tsx
+++ b/packages/edit-site/src/components/style-book/examples.tsx
@@ -99,10 +99,7 @@ function getLandingBlockExamples(
 		title: __( 'Headings' ),
 		category: 'landing',
 		blocks: createBlock( 'core/heading', {
-			content: `AaBbCcDdEeFfGgHhIi
-				JjKkLlMmNnOoPpQqRrSs
-				TtUuVvWwXxYyZz
-				0123456789{(...)},?!*&:;_@#$`,
+			content: `AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz0123456789{(...)},?!*&:;_@#$`,
 			level: 1,
 		} ),
 	};