It might be useful to hang a peg board up there, then you could hang the rulers there. As you get more rulers or need more storage, you can just move the pegs around and hang what you need. We had one in our son's room along time ago. Painted the part with the holes with one color and then my husband "framed" the board with stained wood, so it looked nice on the wall. I still have that in the garage.....don't have enough wall space left for it in my sewing room....but someday....I might find a place for it. It's to pretty to not use somewhere!