I have an Olfa 12" rotating mat and it's good if I'm working with very limited space or doing some light trimming, but I prefer my big Olfa 24" x 36" mat with a big non-skid ruler. I also bought "puzzle mats" from JoAnn's which are 12-1' square plastic mats that fit together to make the size you need, but I hate them. Probably more so because they are not self healing and I cut with a heavy hand.