This is the Kai CB-2, gridded 21-inch by 16-inch Cutting Mat (Phys. Dimensions: 23 5/8 in. x 17 3/4 in). Because of its size, it is ideal for medium-sized projects, and easily fits on most tables. It also features the ability to "self-heal" from minor cuts and scratches due to its three layers of PVC. Which, in-turn, helps to extend the life of the cutting mat.