They're from a company called "Neat Containers."
This is the "Shoe and Boot Kit," which fits absolutely perfectly! I've ordered a "Combo Kit - Large" for the other side of the closet.
The whole project started when I tried to find a shoe cubby like Cat's, which OSH apparently no longer carries. So I googled "shoe storage." This is way cooler than I what I had in mind! They also have hat-sized boxes, but since I only have one nice hat (thank you, Lizzie!), I really don't need any.
I did go to OSH for a stepladder.
