This Sweet Day clear stamp set is the perfect addition to your craft projects! They peel off their backing and stick to any acrylic block making for easy stamping. They are made from photopolymer which is latex free, phthalate free, non-toxic and biodegradable. Details:Sweet Day themeLargest stamp measures approximately 4" x 2.38"17 clear stampsPhotopolymerFor use with acrylic blocks (sold separately)