The Portland Stamp Company is celebrating and reviving the lost art of poster stamps. Printed on lickable, gummed paper and pinhole perforated by hand on their vintage machines. Risograph printed, 16 stamps per sheet. Designed by Miriam Klein Stahl. Packaged in an eco-friendly, vegetable-based cellulose protective sleeve with chipboard backing. Please Note: This is not actual US postage, but a series of artist-created stamps intended for both adornment and collecting. Proceeds benefit Queens of the Castro. Sheet Size: 5.5" x 8.5"