Fiskars 12-83727097J Self Healing Rotary Cutting Mat, 24x36 Inch Extra-large mat provides ample space for all your fabric-cutting needs Self-healing mat provides a cutting surface that lasts longer than others Easy-to-read measuring grid on both sides means you can turn the mat over for double the usage 30-, 45- and 60-degree bias lines make creating triangle and star shapes easy Lifetime warranty