And what's so good about it is you can use whatever size ruler works for your storage situation. I used a 5"; just perfect for my file drawers, can have 2 rows side by side. I can't believe how much more room I have now. I was able to empty all my boxes of new stuff sitting around; even had room for my Connecting Threads stuff that just came today. All I have to do is drag out my Christmas bin and refold that. But I need to sew on a quilt due to give on Aug. 7th.