SMALL:

5x5
5' x 5'

Think of it like a standard closet. Approximately 25 square feet, this space is perfect for about a dozen boxes, a desk and chair, and a bicycle.
5 x 10
5' x 10'

It’s like a standard walk-in closet. Approximately 50 square feet, this unit holds a dozen boxes, a desk and chair, and a mattress and box spring.
5 x 15
5' x 15'

The size of a large walk-in closet, this rental can hold the contents of a small studio apartment, including small furniture, boxes, and bookcases.

MEDIUM:

10 x 10
10' x 10'

Approximately 100 square feet, this space can hold the contents of several rooms. You could fit an entire bedroom set, a couch, and a kitchen table.
10 x 15
10' x 15'

Use this space to store the contents of a small house or a two-bedroom apartment: two couches, two mattress sets, a coffee table, fridge, and TV.

LARGE:

10 x 20
10' x 20'

The size of a one-car garage, this space can hold a fridge, washer and dryer, three mattress sets, a dining room set, bookcases, couches, and boxes.
10x25
10' x 25'

This space can fit a couple of couches, an oversized arm chair, dining room set, fridge, washer and dryer, entertainment nook, bookcases, and more.
10x30
10' x 30'

Fit the contents of a three- to four-bedroom house. This 300 square foot space holds many mattress sets, dining room sets, couches, and boxes.