Product by Omnigrid. The 18 x 24-inch Omnigrid cutting mat is ideal for larger-scale sewing and quilting projects. It accommodates a standard folded width of 45-inch fabric. 1" grid, and 1/8" edge markings and angle line markings on one side for measuring and cutting; the opposite side is unmarked gray that can be used for cuts that don't require ruler/grid alignment.