Creative Grids Self-Healing Double Sided Rotary Cutting Mat 12in x 18in. The Creative Grids rotary cutting mats are self-healing and double-sided. Our 5 layer cutting mat gives you two cutting surfaces and two separate layers of self-healing material. One side features 1in grid with 1/8in markings. All numbers are printed outside of the grid area, so they are always visible as you work. Popular 1-1/2in cuts are highlighted with white stars, 2-1/2in cuts with white squares for both horizontal and vertical cutting. 1/8, 1/4, 1/3, 3/8, and 1/2 yard cuts are all marked for easy reference. 45 and 60 degree diagonal lines are also included. The second side is designed to use with the Creative Grids Stripology series of rulers. This side has 1in vertical lines, 1/2in horizontal lines, and 45 degree diagonal lines. Line up the fabric and rulers on the spaced horizontal 1/2in grid lines. No other distracting markings are needed. Color: Grey. Use: Cutting Mat. Grid Size: 12 inches x 18 inches. Total Size: 13-1/8 inches x 19-1/8 inches. CHK-CGRMAT1218