What is the right size for my storage needs?

5x10 will hold a couch, chair, chest of drawers, mattress set, boxes and small items.

7.5x15 will hold standard furnishings from a one-bedroom apartment with a refrigerator or washer & dryer, plus boxes and small items.

10x15 will hold furnishings from a small house or two bedroom apartment without appliances, plus boxes and small items.

10x20 will hold furnishings from a small house or two-bedroom apartment with appliances, plus boxes and small items.