How to Choose the Best Storage Unit Size for You

Published on 10/26/2022
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What size storage unit do you need? Unfortunately, many standard storage unit sizes have different capacities so the answer isn’t always simple. 

The best storage unit size for your situation depends on a number of factors including availability, intended use, and the belongings to be stored.

Use this detailed storage room size guide to narrow down your choices.

How to Choose the Right Storage Unit Size

  1. Determine the main function of the storage room.

You don’t want to outgrow the storage space and then have to move everything to a larger space. To help you figure out the size of the storage space you need you must first evaluate the main purpose of the storage unit.

Some common questions to ask might be:

  • Do I have an expanding business?

  • Do I have a car?

  • Do I want to keep certain items indefinitely?

  • Do I need temporary storage to move around?

  • Will I move objects in and out of the unit?

It is important to know what you want to store and how often you will replace items in your storage unit. The function of the room influences the most reasonable storage room size.

For example, if you plan to store inventory for your business, rent a larger unit than you initially need in preparation for growth and to allow for easy organization. If you want to take up a little less storage space in your home, choose something that really gives you extra space.

However, if you only need to store items during a temporary move, choose a unit size based on what you have to store today. In this case, the stuff you’re storing is less likely to change.

  1. Create a startup checklist.

It helps to go around the house and make a list so that you have a general idea of ​​what you want to store in your storage unit. Sometimes you don’t realize how many things you have until you actually do your inventory.


Keep the following in mind when creating an inventory:

  • Include an estimate of how many moving boxes you will store.

  • Decide how much furniture will go into storage.

  • If possible, take approximate measurements of larger items.

  1. Measure the size of the storage unit using a painter’s tape.

If you have trouble visualizing space here’s a trick to try. Use some painters tape or masking tape to mark the average unit size area (check our website to see sizes and what’s currently available) in the hallway, living room, garage, or other open space. Then start placing empty moving boxes to see how quickly the space fills up. This trick works best for smaller storage units.


  1. When in doubt start with a larger unit.

Being more efficient by choosing a smaller unit than you need is not always a good idea. For example, avoid stacking more than four boxes high. Also avoid placing furniture more than two pieces high. Doing so may damage your belongings or be dangerous when you’re accessing your storage unit. 

Also note that larger units can sometimes only cost you a few extra dollars per month. In many cases, larger units are cheaper per square foot so moving up a size won’t necessarily break the bank. Don’t let the big size put you off before running the numbers.


Selecting A Storage Unit Size


When reviewing the storage unit sizes below please note that not all sizes are available in all locations. In this case it is better to choose a larger size.


5x5


This compact space is the smallest storage unit in most storage facilities. How can you use it? 5x5 is perfect when you need a little extra space at home. Let’s put the size in perspective - this unit is about the size of a small walk in closet. It should have several boxes and one or two pieces of furniture.


What fits?

  • Chest of drawers

  • Several moving boxes or totes

  • Small chairs

  • Clothing

               5x10

5x10 is typically the second smallest storage unit useful if you want more space for your things. This size is perfect if you live in a small apartment. For comparison this is about the size of a medium walk in closet. However, it is large enough for a king size bed and an extra wardrobe along with about ten to fifteen medium sized boxes.

  What fits?

  • 1-2 large pieces of furniture

  • 10-15 moving boxes or totes

  • Yard Equipment


 5x15

The next narrowest size is the 5x15 storage unit which is 30 percent larger than the 5x10. This storage unit fits full-size living room furniture and works well if you’re moving out of a studio apartment. You can also store the motorcycle for the winter.

      What fits?

  • Bedroom furniture

  • 10-15 moving boxes or totes

  • Motorcycle (put cardboard under in case it leaks oil) - only allowed in drive-up units

10x10

A 10x10 is the most common entry-size storage unit. It’s a mid-size unit that’s about half the size of a standard garage stall. The contents of a typical 2-bedroom apartment will generally fit in this unit size.

What fits?

  • Major appliances

  • Contents of a small apartment

  • 10-20 moving boxes or totes

10x15

Consider 10x15 for intermediate size units. You can store the contents of a larger two-bedroom apartment in this size unit, and even large items like a piano. If you have a very compact car, ATV, or motorcycles, this unit could work for you too.

What fits?

  • Certain compact cars (measure carefully)

  • Contents of a 2-bedroom home

  • Major Appliances

  • 10-20 moving boxes or totes

10x20

The largest “typical” unit size is 10x20. To visualize this, imagine the size of a one-car garage. The unit should house all the furnishing appliances and boxes, most mid-sized cars, or two or three bedroom homes.

What fits?

  • Belongings form a 2-3 bedroom house

  • Compact cars and mid-sized cars

  • Fair amount of small business inventory or supplies

           10x30

One of the largest storage units available is the 10x30. Renting this storage unit gives you access to approximately 300 square feet of space. This unit is large enough to fit a 4-bedroom home. If you have a large family or your business is growing and you need a lot of space - look no further! You can load a pickup truck here but there is still room for a lot of odds and ends.

What fits?

  • Contents of a four-bedroom house

  • Mattress sets

  • Large Appliances

  • Dozens of boxes and totes


If you’re still not sure how much storage space you need please contact our customer service with specific questions.