A monster of a birthday set, featuring the cutest little devils along with assorted birthday and invitation messages. Hero Arts 4" x 6" clear stamp sets offer the best quality in the market. They are made in the USA from genuine photopolymer, which is non-toxic, biodegradable, and designed specifically to transfer ink to paper for a true impression every time. Peel off your stamp from its backing and stick to an acrylic block for easy positioning. Mix and match the designs, then clean with water or stamp cleaner. Coordinates with Monster Greetings Frame Cut dies by Hero Arts. This package includes 22 clear stamps on one 4" x 6" backing sheet.