Many years ago there was a product called a Ruler Roundup...I got one of the original ones that were sort of a mottled beige, then they made clear ones....it holds rulers up to 24". and also has places for scissors, pens, pins, etc. I have it sitting on my sewing table, but it can also hang on the wall. It has 3 divisions so I have my longer rulers in back, mid size rulers in middle, and shorter rulers in front. We had them at our quilt shop at each cutting table...we could have sold many of them after they stopped making them.