The Omnigrid Cutting Mat with Grid features a 1-inch grid, and 0.13-inch edge markings and angle line markings on one side for measuring and cutting. Its opposite side is unmarked gray that can be used for cuts that don’t require ruler or grid alignment. Pair this mat with an Omnigrid ruler for ultimate measuring and cutting accuracy. Use it with a rotary cutter or a straight-edge blade. This 24 x 36-inch mat has a self-healing surface.