This is for my son's 12x12x72" school locker. As long as there is shelf in the locker it will fit. He says it works fine. The material is durable and I don't see it tearing unless someone reaches for scissors or a knife. The boards on the bottom are also very sturdy and will hold up to any type of book. My son also has a 12" x 12 "Folding shelves at the bottom of his locker, but these hanging shelves are great because you can store your books without falling in. I will definitely buy these for my daughter when she goes to high school."