Spellbinders Sealed Glass Mat from the Clear Seal Maker Tool CollectionSealed Glass Mat is from the Clear Seal Maker Collection and is a white tempered glass in a square shape with rounded corners. When used with the WSA 002 Clear Seal Maker Tool and WSA 003 Clear Seal Sticks achieve crystal clear seals. Makes a wonderful addition to your work space! Clear Seal Maker Collection offers unique and wonderful seal designs to add that perfect touch on handmade cards, envelopes, invitations and beyond! Approximate Size: 6. 25