64 square feet - Our smallest unit

96 square feet - About the same size as a 10x10
Has double doors instead of a single door for additional convenience in moving extra-large items

128 square feet - Two single doors on the front wall of the unit (Used to be two 8x8's: Center wall removed to make one big unit)

192 sqft - Almost equivalent to a 10x20
Two single doors: one on each side of the front of the unit.