This is by far the best, most inexpensive, quick little trick you can do to improve your quilting. Apply sand paper tabs to your ruler. That is it! It is super cheap and takes seconds. They completely stabilize your ruler while you are cutting. So now all of your fabric pieces will be the size they are supposed to be and not 1/4″ larger on the spot that your ruler slipped. I have tried every fancy ruler out there that is supposed to help with slipping while rotary cutting. There are fancy handles, little rubber bumps and a million other things, but none of them work as well as the sand paper tabs and they are all a lot more expensive. So do yourself a favor get a package of these little lovelies and slap them onto every quilting ruler you own. You will thank me later.