This is the OLFA Folding Cutter Mat A3 in Navy. It's easy to use and convenient to carry, as it's A3 size when unfolded and A4 when folded. Features include 1cm grid lines, 1mm increments, and 30°, 45°, and 60° angle guides. It also has markings for postcard, B5, A4, B4, and A3 sizes. The image only shows the mat in its folded state.