Originally Posted by lab fairy
Make sure you get a self-healing mat. The big white ones that I've seen at Joann's is not one that self-heals. Definitely research the brand before buying. There is a big difference in how the mats work. Most non self-healing mats will scar up and dull blades much quicker than the other.
Lab fairy is right. I had one of the white mats that wasn't self-healing and it dulled my blades. I no longer use it but it came in handy when we did a jigsaw puzzle :D