Made for Olfa cutting products and other rotary cutters. Prevents wear and tear of blades. Cutting surface on both sides with self-healing base. Features grids on one side only. 0.62 cm (1/4”) hash marks on all four sides; 2.5 cm (1”) grid marks on all sides; two bias diagonals; inch markings are in yellow and on two sides. Thickness: 1.5 mm (1/16”). Green.