I have small self stick pieces of sandpaper on the backs of my rulers to hold them in place while cutting. You can get it at a hardware store or Wal-Mart. Also, I saw something at JoAnn's that is a self stick sheet or roll of clear plastic, that another lady said covers the entire back of the ruler and keeps it from moving. I think the roll was about $20. I didn't get any so I don't know if it works, but it's another possibility. Hope this helps. :-)