I use a flexible Clear tape, aka 3M Surgical Tape. Comes on a roll like regular 'scotch' tape and I got it at RiteAid drug store. It has a nice soft weave on it that holds the rulers very well. And it is see-thru.

My ruler slips often, just ordered these...looking forward to trying.

I buy the course sand paper sheets that have sticky backs and cut strips for my rules , works great.

I have the sandpaper "dots" on my rulers (which themselves are sold as "no slip" rulers), but I still get some movement. So I'm going to give this product a try since it's gotten such great recommendations from many of you! :)

Yes, they absolutely work. I love that my ruler no longer goes askew and I now have straight cuts.

I just bought some for all my rulers, may have to order more.

I just ordered 2 set plus one of their rulers. Can't wait to try them!