Mat made for double sided usage, the green side for light fabrics and the light gray for dark fabrics. The green side has a yellow grid that extends to the edge of the mat for both right and left handed users. The grey side while suitable for use with rotary cutters, does not have markings on. This mat is designed to keep your rotary cutting blades sharp longer. Great to use with rotary cutters and Omnigrid rulers. Keep out of sunlight and store flat, do not roll up. Overall size is 6in x 9in - with 1in grid, size of grid markings is 5.5in x 8.5in, perfect for take-a-long, classrooms, beginners, quilting, crafts, memory books and more.