Product Description This OLFA rotary mat does more than just protect your work surface. It also extends the life of your rotary blades. Use the marked side of the mat for precision cutting, the solid side for general cutting. You'll notice that the gridlines include angle markings; this makes tricky tasks, like creating true bias strips, much easier. Vary the location of your cutting to allow the mat to self-heal. Particles stuck in the mat? No problem ? just erase over them with an art gum eraser. The mat is great for quilting, sewing, cutting out patterns, rotary cutting, general crafting, scrapbooking and more. From the Manufacturer Self-healing Rotary Mats Are Double-sided, Triple Layer With A Dark Green Base Color And Yellow Grid Lines On One Side For Detailed Cutting And Solid Green On The Reverse For General Cutting SELF HEALING ROTARY MAT - Our rotary mat is self-healing, it reseals surface cuts for a continually smooth cutting surface. Using a self-healing cutting mat extends the life of your blade and protects the surfaces of your work area. DOUBLE SIDED - Our double-sided rotary mat has one side with grid lines and one side without grid lines. Grid lines help with easy measuring and accurate cutting of straight lines and precise angles. The solid color side is used for general cutting. 24 INCH BY 36 INCH MAT - This rotary cutting mat is 24"x36" and 1.5mm thick. The large size makes it perfect for most crafting projects. Great for cutting multiple layers of fabric into bias strips, squares, triangles, and squaring up blocks. PROTECT YOUR ROTARY MAT - Our professional quality cutting mat is designed for use with rotary cutters only. Not for use with fixed blade utility knives. To prevent warping, store it flat and out of direct sunlight. THE OLFA STANDARD - As the inventor of the Rotary Cutter in 1979, OLFA has maintained a standard of cutting excellence for our quality and durability. Pairing OLFA brand rotary cutter, blades and cutting mats together will provide optimal results.