For a practical and amusing gift, check out these high-quality hardwood hexagon puzzle coaster sets. Made from eco-friendly and sustainable materials, your members will enjoy putting the coasters together to form a full size image of, for example, your union hall or international logo. Then when it’s time to break out the drinks, take the coasters apart to keep tables clean. 3.5” L x 4” W x 0.1875” Thick.