Approximately the size of a small walk-in closet, a 5'x 5' space is ideal for storing small pieces of furniture, boxes, and miscellaneous small items.

A 5'x10' space is about the size of a large walk-in closet and can contain, for example, a couch and a chair, bedroom set and small items and boxes.

A 10' x 10' space is about the size of a small bedroom and will hold the furniture (excluding appliances) from a one-bedroom apartment.

A 10' x 15' space could hold the contents of a two bedroom apartment, or a small car, if the unit has a garage door.

A 10' x 20' unit is about the size of a standard one-car garage. It's big enough for a car or truck, furniture, appliances, and personal items from a two bedroom house.

A 10' x 30' unit could hold the contents of a three-bedroom house, or provide vehicle storage with plenty of storage space left over for the contents of one or two small bedrooms.