From the maker

Our largest Cutting Mat is perfectly sized for cutting full widths of fabric right off the bolt, extra-large fabric squares and long fabric strips. A self-healing mat with measuring grids on both sides gives you a work surface that outlasts other mats. Included quilting square and bias lines make cutting perfect squares, shape cutting and cutting at angles a breeze. - Self-healing mat provides a cutting surface that lasts longer than others - Easy-to-read measuring grid on both sides means you can turn the mat over for double the usage - Quilting square makes measuring and cutting perfect squares for quilts easy - 30-, 45- and 60-degree bias lines make creating triangle and star shapes easy - Store flat away from sunlight, heat and cold - Clean with warm water and mild soap - Lifetime warranty