6in x 8in Navy Mat Whether you're new to crafting or a pro, you'll appreciate this Navy 6x8 OLFA rotary mat. Perfect to have next to your sewing machine for trimming seams or taking with you to class. 1.5mm thick. Double-sided mat is solid Navy on one side for general crafting and has yellow grid lines on other side for detailed cutting. Self-healing finish reseals surface cuts, providing a continually smooth surface for all cutting projects. For use only with rotary blades and blades; fixed-blade knives blade may damage mat. Store flat and out of direct sunlight.