PhotoPlay Say It With Stamps Photopolymer Stamps – Envelope Art – Dress up your handcrafted envelopes with the Envelope Art Clear Photopolymer Stamps from the Say It With Stamps Collection by Becky Moore for Photo Play Paper. Included in the package are 6 clear stamps on a 4in x 6in storage sheet. The stamps can be used with an acrylic block (sold separately) of your choice and your favourite inks (each sold separately).