Create your own custom invitations with these overlays. Add these invitation overlays to a card, add other coordinating design elements and create cards that are customized for your occasion or recipient. These birthday overlays are vellum so they can be placed over decorative cards or accents. They announce that this is a "birthday party" and offer plenty of space for sharing all the party details. Each measures 4 1/2" x 5 1/2".