Monster Mash Hallween postage Celebrate Halloween with fun Halloween postage stamps! Spread the Halloween cheer with your Halloween cards, party invitations, and everyday correspondence! Shop our full selection of Halloween T-shirts & Gifts! Medium, 2.1"" x 1.3"", $0.44 (1st Class 1oz) Fantasy, Science Fiction Fantasy Creatures, Races Monsters Events, Holidays, Greetings Major Holidays Halloween