Made from the highest quality commercial grade material, these double sided, color contrast mats are highly durable with a self healing surface that actually repairs itself. Designed for both left right handed individuals. Double sided for extra longevity. Has a dark light side to show the contrast in colors of the project you are working on. Marked with 12" gridlines, 18" increments along the edge 45, 60 90degree angles, with clearly detailed cutting graphics. 18"x24". Freight Intensive Billable transportation charges for freight intensive items will be the greater of the dimensional weight compared to the actual weight. In addition to transportation charges, freight carriers may assess an additional oversize charge per package.