5/16 x 4 Round Cork Coasters made from natural cork. Suitable for commercial and craft projects, coasters, small plant holders, table place mats, backings and more. Cork is a natural thermal insulator. Cork's natural properties resist mold and mildew and are hypo-alergenic. Each round cork coaster is 5/16" x 4". Each pack contains 6 round cork coasters. Round Corks are eco-friendly as no trees are cut down in the production of cork. Bulk available.