This self-healing cutting mat is great for both fabric and paper crafters. It is ultra-thick and can be used with rotary cutters, blades, and setting tools. The double-sided surface not only gives extended life to the mat but also provides versatility in cutting for you. One side has white grid lines while the other has black which ensures optimum visibility when cutting either light or dark papers or fabrics. There are rulers on all four edges with 1/8 inch and 1 millimeter increments. The cutting grid itself has horizontal and vertical lines every 1/4 inch. Overall dimensions of the mat are 23-5/8x 17-3/4 inches, the cutting grid measures 23x17 inches. This package contains one American Crafts Cut Up Self-Healing Mat. Imported.