I was so annoyed when I bought and built 2 Closet Maid shelves only to find that they were this weird, smaller size that only has room to fit 1 of those standard fabric cube bins leaving you with 2 mini shelf spaces. I tried to hunt down anything close to a bin or basket that could maximize the shelf space for me, but no luck. Then I found these!! These cubes seem like they were built precisely with these shelves in mind! Perfect!! So pleased that they exist.