Olfa 17" X 24" Folding Cutting Mat. Durable cutting surface. Mat absorbs cuts made by both rotary cutters and art knives straight utility knife blades. Mat folds flat for easy portability. When flat, foldline becomes almost invisible. Wavy fold line creates a smooth, gapless surface when laid flat won't skip threads when cutting directly over fold. Padded, nonslip backing on FCM12x17 mat ONLY. 2.5mm thickness. FCM12x17 Size when open: 12.75 x 18 Size when folded:12.75 x 9.125. First Available: September1, 2015.