Order this in both sizes right now! LOL Honestly it's the best safety tool for rotary cutting.
http://quiltersslidelock.com/
The cut resistant glove will save a cut from being really bad. Amazon has sizes from very small to very large. But nothing will help if you don't use it with every cut. I am a believer and a devoted fan of using a safety tool when rotary cutting. All it took was one cut for me.