Dress up your envelopes easily with the Envelope Art Clear Photopolymer Stamps by Altenew! The package includes 25 clear photopolymer stamps that are made in the USA. The set includes banners, a heart, flowers, "happy mail for," "sending smiles across the miles," "sent with love from," and more. The stamps can be used with an acrylic block of your choice and your favorite inks (sold separately).