Size:18x18 | Color:Green Calibre Art bring this unique self healing rotary cutting mat for people who enjoy quilting and other small art and craft projects. The mat provides the perfect surface for you to cut papers, fabrics and leather strips. Not only does it protect your tabletop, it also protects your blades because of the soft compound of the mat that does not dull blades like cardboard does. The mat’s surface is made with high quality material that is European Commission EN 71-3 compliant. The surface is free of heavy metals and does not emit gas. The self healing property of the compound helps with resealing of surface cuts and allows the mat to retain its smoothness so that the cuts do not interfere with subsequent cutting. The rotating feature of this self healing mat allows you to rotate the mat (and the material) instead of changing your body posture while cutting. This makes cutting easier, better and safer because you retain optimum wrist and arm angles for your cutting hand. Along with the highly accurate grid lines, there are also many angle lines (every 15 degrees) to assist you when you need to cut special shapes. The grid line color and mat base color are chosen such that they are very easy for the eyes to read, providing enough contrast but not hurting the eyes. The surface texture is designed to not cause glare. There are 3 size options available for this mat: 18" x 18" (17" grids), 14" x 14" (13" grids) and 8" x 8" (7" grids).