Any guesses? Yup, it's the tape. Double sided tape to be exact. Most of my rulers are the old school kind, without non-slip backs. I've looked into getting the new ones, but they're pricey and my old ones still work. So, a few strips of double sided tape and those buggers aren't slipping anymore while I cut. And it's perfect for my 2x wedding ring templates, even better than the felt stickers I have on some of them. Oh, and the tape, easier to find than new rulers or fancy grip stickers!
just call me Macgyver,