Olfa's Spinning Rotary Mat measures 17 inches by 17 inches and features a 360 ° grid. Turn the Spinning Rotary Mat completely around and still get accurate cuts. This self-healing rotary mat features a non-slip backing ensuring stability while cutting. Easily make 30 °, 45 °, 60 ° and 90 ° cuts with your Olfa Spinning Rotary Mat.