TONIC STUDIOS-Tempered Glass Cutting Mat. Use this 13x13in glass cutting mat with your Tonic and other scrapbook, card making and paper craft cutting tools. This mat will protect your surfaces and give you a clean durable surface to cut on. This mat features an overall 12x12in grid with a 4-1/4x5-1/2in, 8-1/2x5-1/2in grids and a 6x6in diagram for ever angle from 0 to 90 in 5 degree increments.