12 inch Round Corks are available in packages of 6. 12 inch Round Cork Trivets are ideal for commercial, craft and home use and are popular as hot plate mats, place mats, table trivets and more. 12 inch Round Corks are great for use as trivets or under vases. potted plants and lamps. Manufactured with fine Portuguese cork. Round Cork Trivets are eco-friendly and hypoallergenic.