I have to 36" O'lippa ruler it is 4" wide with the lip. I use it quite often, it comes in handy when I am checking out how straight my edges are when getting to put on the binding, I also have the large white cutting mat from Joanne, I put it on my pool table which I use to cut out my fabric on, I use it all the time, the only time it's moved is if someone decides they have just got to play pool, then I store it behind the couch in the game room standing on edge