IDEAL FIT: Adjustable to fit almost all work, school or gym lockers, get your locker organized right away! Adjust width from 8" to 12 1/2", and height from 9 3/4" to 14". Shelf depth is 9 1/2". EASY TO USE: perfect locker shelf for work, school or gym lockers. Assembles in less than 2 minutes without the need for tools. STACKABLE: Stack one shelf on top of the other when purchasing multiple units. Legs of top shelf insert into top of bottom shelf. Create a shelf wherever you need one, or combine multiple shelves for tons of extra storage. DURABLE: Durable construction holds your belongings, strongly and securely SIDE-MAGNETS for Extra Support: Side magnets provide support to the shelf by affixing to the inside of a metal locker, allowing for a weight capacity of up to 40 lbs.