Half door and two person lockers use as much space as a single full door locker, but they are split into two units, which doubles the number of lockers overall. These are extremely popular because they are a nice middle ground between full door and box lockers. They provide a moderate amount of storage space while also being more efficient on overall space than full door lockers. Used half door lockers are one unit over the other, each unit being the same with as a full door locker. Two person lockers are two vertical units side by side, which are the same width as one full door locker as well. They also have two small shelves overhead for storage of small items.