The Creative Grids® Self Healing Rotary Cutting Mat is double-sided. One side features one-inch grids with eighth inch markings over the entire surface. All numbers are printed outside of the grid area, so they are always visible. Popular 1-1/2 inch cuts are highlighted with white stars; 2-1/2 inch cuts with white squares. Eighth, quarter, and third yard cuts are marked with dashed lines for easy reference.