Product Specs: Outer Dimension (Full Size of Mat): 40” X 72” Grid Dimensions: 38” X 68” Includes The Big Mat Scraper Product Overview: Made in USA Durable PVC-blend made from recycled materials Designed to provide support and precise measurements for rotary cutters Firm and durable; resistant to warping and buckling Minimizes blade-skipping, snagging, debris build-up, and fiber shedding Can be cut to the exact size you need for your workspace or projects Odorless Product Care: Please read and follow the directions that are provided with The Big Mat. We recommend using any Olfa Blade that can be loosened. Tight blades create scoring cut marks. Use The Big Mat Scraper, as needed, to reseal any cut marks. Do not iron directly on The Big Mat as it is made of plastic and may melt. Do not re-roll The Big Mat for storage after it’s been cut on.