A locker is a small, usually narrow storage compartment. They are commonly found in dedicated cabinets, very often in large numbers, in various public places such as locker rooms, workplaces, schools, transport hubs and the like. They vary in size, purpose, construction, and security. General description and characteristics. Lockers are normally quite narrow, of varying heights and tier arrangements. Width and depth usually conform to standard measurements, although non-standard sizes are occasionally found.
https://en.wikipedia.org/wiki/Locker