Pins are made of soft-enamel style coated and painted Iron Zinc Alloy with Enamel paint coloring. They have two pegs with rubber caps/clutch on the back to hold the pin securely to clothing/bags/or other soft material. Pins: Gelatinous Cube (~1.6in), Owlbear (~1.75in), Beholder/Eyebeast (~1.6in), Treasure Chest Mimic (~1.6in). Artists: Mike Saltzman, @AlexLexi. Note: Sizes are approximate and vary a little (see picture with Chessex D20 and US Quarter for a better idea of exact sizing).