HAMPTON ART-Cling Stamps. Hampton Art offers premium quality rubber stamps in a wide variety of images and themes to match any and every project or design style. Each stamp is mounted on 1/8-inch thick cling foam and can be used with any acrylic block. This package contains thirty cling rubber stamps of assorted shape and size on a 4-1/2x4-1/2 inch backing sheet. Design set: Simple Alphabet. Imported.