These clings are repositionable stamps backed with a special material that uses static cling to stick securely to acrylic blocks for clean easy stamping. Each one is hand made with 100% all-natural rubber that is latex free, phthalate free, non-toxic and biodegradable.Details:Leafy Vines5" x 6.5" backing sheet sizeRubberFor use with acrylic blocks (sold separately)