Hero Arts-Stamp & Die Set. These clear stamps peel off their backing and stick to any acrylic block making for easy stamping. Simply apply your favorite ink and stamp crisp clear images! They are made from 100% photo-polymer which is latex free, phthalate free, non-toxic and biodegradable. Use the die for an added layer! This package contains Unicorn: a set of twenty-three clear stamps on one 3.125×4.12 inch backing sheet and four dies between .875x.625 inches and 2.5×1.75 inches. WARNING: Choking Hazard, small parts. Not for children under three years. Imported.