Cutting mats protect your work surface while you’re cutting fabric for quilting or sewing projects. Mats include measurements and angle lines so you can measure and cut in one step, while keeping your lines straight. The measurements are printed along the outside of the mat and along its center axes, so you don’t have to worry about covering up your numbers with your fabric. Martelli mats also feature 45-degree and 60-degree angles as well as concentric squares for squaring up your blocks. Additionally, all mats except the 12” x 12” are self-healing with proper use (Martelli recommends using the Martelli Ergo Cutter with these mats).