GO! Rotary Cutting Mat-24″ x 36″ is a self-healing, double-sided, ultra-thick mat (3mm) and can be used with the GO! 45mm Rotary Cutter (55449) and GO! Quilting Ruler-6″ x 24″ (55474) for pre-cutting fabric strips for use with your AccuQuilt GO! Fabric Cutting System. The mat features gridlines with inch, 30, 45 and 60 angle markings. Dimensions Weight in lbs.:5.5 24″x36″