Self Storage Size Guide

The below sizing guide will help you get a better idea of how much space you need. In general, we recommend 25 square feet of storage for every room of furniture you'd like to store. Don't worry if you can't choose between two similar sizes—just rent the space online that you think works best, and if you need another size, we'll adjust your reservation with no problem!

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What Fits in a Storage Unit?



< 6 FT tall, 16-24 sq. ft.
Closets are ideal for personal or business storage of items you need quick and easy access to, or want to store for a long time.
  • Books
  • Seasonal décor and clothing
  • Sports equipment
  • Window AC units
  • Small-Medium boxes
  • Documents
Typical items in a small storage unit, including files, skates, a guitar, and a bike


Up to 80 sq. ft
About the size of a standard garden shed. Great for storing one room of small furniture.

  • Kitchen appliances
  • Camping & hobby gear
  • Seasonal decorations
  • Garden equipment
  • Family photos
Works well for 1/2 a transit van load.
Typical items in a medium storage unit, including skis, storage totes, a Christmas tree and toys


81 to 150 Sq. Ft.
This is the size of a single garage. Good for a typical two-bedroom home.

  • Wardrobe
  • Divan bed frame
  • Three-piece suite
  • Nursery furniture
  • Larger sports equipment
Works well if you have 1 1/2 luton van load or an 18 ft container.
Various pieces of furniture in a large storage unit


151 to 300 Sq. Ft.
This is the size of double car garage. Perfect for moves if you have larger appliances, as it will hold the entire contents of a five-bedroom home.

  • Large bed sets
  • Refrigerators
  • Retail inventory
  • Construction materials
Works well for 1 1/2 7.5 tonne box lorry loads.
A storage unit that's being used as a workshop

Extra Large

301 Sq. Ft. and up
This about the size of a three-car garage. Ideal for businesses and managing inventory.

  • Tools
  • Large vehicles
  • Eight rooms of furniture
  • Retail inventory
Ideal if you're moving with an articulated lorry.
A couple standing by their RV


18 to 38 Ft. deep
Parking spaces large enough to accommodate your car, truck, boat, or RV. Rent space for your trailer, jet skis, or RTVs. Learn more about how storing your RV at StorageMart can help keep your vehicle safe during inclement weather.  

Rent parking spaces for your company trucks, vans, and other company vehicles, with 24-hour access available for your convenience.
Sizes are approximate. Please inspect your unit and ensure the space you rent meets your needs. Storage unit accommodation ability will vary based on the size of your contents and belongings.