CG Cutting Mat 18 x 24The Creative Grids rotary cutting mats are self healing and double sided. Our 5 layer mat gives you two cutting surfaces and two separate layers of self healing material. One side features 1 inch grid with 1 8 inch markings. All numbers are printed outside of the grid area, so they are always visible as you work. Popular 1 1 2 inch cuts are highlighted with white stars, 2 1 2 inch cuts with white squares, for both horizontal and vertical cutting. 1 8,