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. Comes in two sizes 12" x 17" and 17" x 24"