Bohin's 12" x 18" Self-Healing Rotary Cutting Mat is a self-healing, double-sided mat perfect for your fabric projects. A light background on one side and dark on the other makes this cutting mat ideal for cutting light and dark fabrics. It has one-inch increments on the dark side and centimeter increments on the light side. It has markings at each increment of 0.125", 0.25", 0.5", 0.75" and 1" on the inch side and millimeter markings on the centimeter side, as well as 15, 30, 45, 60 and 75 degree angles on the both sides.