Perfect for cutting squares, triangles, diamonds, circles and any shape which requires you to turn your project or your body around. The two-piece mat has a non-slip stationary bottom layer and an interlocking green top rotary mat which smoothly rotates 360 degrees on the stationary base. The mat self-heals with each cut for a smooth cutting surface, and is the ideal size to take to sewing and quilting classes where you may not have a lot of room. Its sleek and simple design fits easily in a tote and has no ball bearings, stands or other parts to lose. Cutting surface measures 12 x 12 inches and features yellow grid lines and markings, one-inch squares and 15-, 30-, 45-, 60- and 90-degree angles. Simply rotate your work on the mat to keep your cutting angle directly in front of you, simplifying piecework when making multiple cuts and eliminating the need to turn your body.