diff --git a/packages/block-library/src/post-excerpt/block.json b/packages/block-library/src/post-excerpt/block.json
index 4bbc962c9838ef..9809d10ab426b4 100644
--- a/packages/block-library/src/post-excerpt/block.json
+++ b/packages/block-library/src/post-excerpt/block.json
@@ -23,6 +23,9 @@
 		}
 	},
 	"usesContext": [ "postId", "postType", "queryId" ],
+	"example": {
+		"viewportWidth": 350
+	},
 	"supports": {
 		"html": false,
 		"color": {