The Omnigrid double-sided cutting mat is ideal for use in quilting for cutting fat quarters and smaller pieces of fabric; the 12" x 18" double-sided cutting mat is a versatile size - it's portable and convenient for travel, and also ideal for smaller sewing, quilting and crafting areas. It features a 1" grid, and 1/8" edge markings and angle line markings on one side; the opposite side is metric, with a centimeter grid, millimeter edge markings and angle line markings. Both sides of the mat are ideal for ruler/grid alignment and cutting. Couple your Omnigrid mat with an Omnigrid ruler for ultimate measuring and cutting accuracy. Use with a rotary cutter or a straight-edge blade.Details:Green12" x 18"1" grid with 1/8" edge markingsMetric grid on opposite sidePair with Omingrid ruler for best accuracyPlastic