Mallard Mini Storage size calculator:
What size Storage unit do vou need?
5x5 This unit is comparable to a small hall closet, it is ideal for storing stackable boxes and small items.
5X10 Ideal for storing the contents of a 1 to 2 bedroom apartment. Chair, couch,bedroom set & boxes.
5x14 Ideal for storing the contents of a 1 or 2 bedroom apartment, plus.
10x10 Ideal for storing the contents of a 2 bedroom house or furnishings from 2 offices.
10x14 Ideal for storing the contents of a 3 to 4 bedroom house.
10x20 Ideal for storing the contents of a 5 to 6 bedroom house.
10x24 This unit will store the contents of a 6 bedroom house, plus.
Keep in mind that these units have an interior height of
approximately nine (9) feet, which accounts for a lot of "Stackability"

Go ahead, check it out, it's easy!