The Gum Wall started in the 1990s when local patrons and performers at Unexpected Productions stuck their used gum on the wall. Since those days, the wall has grown piece by piece down Post Alley, as visitors and locals leave their mark on the city. This Seattle Gum Wall Sticker captures the vibrant beauty of community art. Choose between a single sticker or four pack of this sticker. Sticker measures 3″ × 1.96″. Durable, weatherproof adhesive made to last. UV Laminated to protect your sticker from scratches and the sun. Designed by Transit Tees in Chicago's Wicker Park neighborhood.