Olfa-Folded Cutting Mat. Durable cutting surface absorbs cuts made by rotary cutters and art knives. Folds flat for easy portability and when flat, the fold line becomes almost invisible. Wavy fold line creates a smooth, gapless surface when laid flat (will not skip threads when cutting directly over fold). Measures 2.5mm thick. Features a flat, green back with no grid lines (Do not cut across the backing of the fold line). This package contains one 17x24 inch cutting mat when unfolded.