Similar size to a hall closet.  Can store small furniture, 5-10 boxes, seasonal items, clothes, small dressor, double mattress.

Similar size to walk-in closet.  A couch and chair, chest of drawers or dresser, mattress set, plus small items and boxes.  Outdoor furniture, lawn mowers, garden tools, etc.

Similar to average sized bedroom.  Furniture from a one-bedroom apartment without appliances, also small items and boxes.

Similar to a large bedroom.  Can store contents of a small two bedroom apartment or condo, refrigerator, washer/dryer. 

Similar to a one car garage.  Can store contents of a three bedroom home, major appliances, car, truck or boat.

Similar to an extra large garage.  Can store contents of a four bedroom house, major appliances, patio furniture, garage extras, car truck, or boat.

Similar to a two car garage.  Can store contents of a five bedroom house.  Will hold contents of a 40 ft. moving van.  Store two autos, trucks or boats.