Self-Healing CUTTING MATS - 4 SIZES AVAILABLE! Reversible Inches and Centimeters - thoughtful design - 5 layer mat, finest available (Size A1 - 24" x 36") Custom designed for usability after extensive study of what customers want Reversible - Green side in INCHES -- black side in CENTIMETERS - .01 mm tolerance for accuracy! Tabs for standard sizes for paper and photographs - common drawing and cutting angles included Tired of tracking to the edge of the mat for the inch? We've solved it by including size markings up and across the mat! Never scan to the edge again. Measurement lines stretch beyond where normal mats go, when your media covers the markings, you can still see them!