I’m a piano teacher and need a compact way to store sheet music so it doesn’t pile up on the piano. These work really well. I bought 4 sets and they fit perfectly in my small bookcase. Now I have slots for different types of books so I can access the ones I need quickly. Since my bookcase is white I would have liked them to come in white but the black work well enough.
I had changed printer stands with my wife which left me with a narrow space underneath to hold printer photo and scratch paper. I had been fruitlessly searching for trays that would be "front-loading" and fit in a narrow space. Until I found these trays. I bought 4 (2 packets of 2 each) and they fit under my printer PERFECTLY!!! I highly recommend this product!!!
I like to use the front loading trays on bookshelves for our homeschool paperwork. They take up less space than the side loaders. These hold plenty of paper and also take clipboards but some pocket folders don't fit well (could be squeezed or angled).
These work very well. Two 2-packs click together nicely to form a 4-high stack. They are great for storing multiple kinds of art paper in a compact space.