When you use Inkadinkado's Expressions mini cling stamp set, you'll be creating unique Halloween party invitations, decorations and more. These retro side show sayings include Believe It or Not, Mind-Bending, Electrifying and Unlucky 13. Cling stamps feature the best of both worlds: the quality impression of red rubber stamps with the convenience and precision of clear stamps. Clings utilize a clear acrylic mounting block (sold separately) with no adhesive needed. Stamp sheet size: 2.5" x 2.5", set of four stamps.