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 Otter Family: a set of 16 clear stamps on one 3.125x4 inch backing sheet and four dies between .25x.25 inches and 2.25x1.75 inches. WARNING: Choking Hazard, small parts. Not for children under 3 years. Imported.