Penny Black Clear Stamps – My Universe – Let them know that they are your universe with a handmade card using the My Universe Clear Photopolymer Stamps by Penny Black. The package includes 9 clear photopolymer stamps that are made in the USA. The set can be used with an acrylic block and your favourite inks (sold separately). Largest: 2.25″ x 3″, Smallest: 1.13″ x 0.38″.