The Martelli Round About Cutting Mat is designed for sewing and quilting projects, featuring a 16 3/4 inch diameter and a grid with lines every 1/4 inch for precise cutting. It includes no-slip material on the bottom for stability and is available as part of a three-piece set that also includes a rotating base and ironing top. This mat is ideal for squaring up fabric and is portable, making it suitable for travel or use in classes.