These Omnigrid double-sided cutting mats are ideal for daily use in your most demanding craft projects. One side of the mat is metric (centimetres) and the other side is Imperial (inches). These mats will keep your work surface clean and provide a durable and smooth surface with every cut. The solid yellow angle lines one ach side provide ease in cutting 45 degree angles any which way. A variety of sizes are available for your crafting or sewing workspace.