I use bankers clips to clip onto my rulers and then hang those on the 3M clear hooks. The hooks don't damage the walls and the bankers clip can stay right on the hook while I'm using the ruler so I know exactly where to put it back! I didn't buy the giant ones, bought the medium size bankers clips so they would grab the ruler better and not slip out. Before I had a 'wall' to hang it on I hung the bankers clips on a coat hanger in my hall (fabric) closet. Works well for me.