This mat is ideal for your very large projects. It measures a full 22" x 34", and it's flat shape makes it easy to store when not in use. The pre-marked grid is in inches and millimeters for your convenience. When you cut on this mat, the cut marks "heal" over and over again. This extra large mat is the largest in our series of self healing mats.* This self healing mat is an extra large 24 x 36 inches in black-weighs about 7 ounces * Excellent protection for your table top or desk top, the mat absorbs all the scratches * Great for cutting paper, cardboard, and other surfaces-pre marked in inches and millimeter * Even when cut, the cuts are undetectable- as if they had healed * Perfect for use with snap blade cutters, utility cutters or hobby knives (not included)