Double sided mats allow you to prolong the life of your mat and use the side that works best with your fabric colors. These highest quality selfhealing mats can withstand any type of cut, while cuts mend themselves so the mat surface remains smoother longer than standard mats. Simple grid layout with the most used markings is less cluttered, keeping cutting lines clean. Extra large numbers are all placed on the outside so you do not cover them when cutting, with top and bottom numbers to match for long strips. Yardage numbers show on the top and bottom for cutting 14yd, 13yd, 12yd, 23yd, 34yd, and 1yd. Extra inch added to the large mat so you have that much needed wiggle room when cutting large pieces 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.