These boxes are the perfect size for file folders of ewither legal width or normal width. They are not hard to put together the third or fourth time. The first two times you are trying to figure them out but by the third time you have some practice. I have tape on the bottom edges of them so they won't pop open. I have found I cna stack them with things in them without them falling down or getting crooked and slipping down over each other. They are a secure and strong kind of box. I can also put labels on them with my markers if I wish but I haven't done that yet. This is a good product.