This is the Kai CB-1, 33" x 21" Cutting Mat (Dimensions: 35-1/2" x 23-1/2"). This Kai CB-1 cutting mat is designed for virtually all types and sizes of projects due to its large cutting area. 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 this cutting mat.