This high quality, self-healing and reversible cutting mat is 3mm thick and extra durable. Made from a unique composite vinyl material, these mats provide a long-lasting surface that can be cut into repeatedly. They also double as a general-purpose work mat. All Pacific Arc cutting mats feature 1/8" and 1/16" scales along the borders, and are imprinted with 1" x 1" grid lines. Each grid is dotted every 1/16". They also include a useful centering arrow that allows you to quickly locate the midpoint.