Alvin self healing and reversible hobby cutting mat is fully numbered and gridded on both sides (1/2", 1/8", 45 and 60 degree angle lines). Made from a unique, 3-ply, long-lasting 2mm composite material with a non-glare surface. Craft cutting mat is designed for both rotary and straight utility blades, and will not dull blades. Budget-priced for those not needing heavy-duty professional self-healing cutting mats. Blue on one side, gray on the reverse; both sides with full 1/2" grid. Alvin 18" x 24" hobby and craft mat.