By Gudrun Eria, 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.The other side is designed to use with the Creative Grids® Stripology series of rulers. Line up the fabric and rulers on the spaced horizontal half inch grid lines. That is all you need – no other distracting markings and lines are needed!