What Size Storage Unit Do You Actually Need? A Practical Guide

Mark Byrge • March 9, 2026

What Size Storage Unit Do You Actually Need? A Practical Guide

Choosing the right storage unit starts with understanding how much space you truly need.

Renting a unit that’s too small can lead to frustration and tight packing. Renting one that’s too large may mean paying for unused space. With a little planning, you can select a unit that fits your needs comfortably and efficiently.

Here’s how to determine the right size.


Step One: Take Inventory

Start by listing what you plan to store.

Are you storing:

  • Seasonal décor and boxes?
  • Furniture from one bedroom?
  • Household items during a move?
  • Business supplies or equipment?

If you’re still deciding whether storage makes sense, review 5 Signs You’re Running Out of Space at Home (And What to Do About It) to evaluate your situation.


Small Units (5x5 or 5x10)

Ideal for:

  • Boxes and totes
  • Small furniture pieces
  • Holiday decorations
  • Office files
  • Sporting equipment

A 5x5 unit is similar to a small walk-in closet. A 5x10 unit can typically hold the contents of a small bedroom.

If you plan to store items for an extended period, see A Guide to Storing Furniture Long-Term to protect your belongings properly.


Medium Units (10x10)

Ideal for:

  • One- to two-bedroom apartments
  • Several furniture items
  • Appliances
  • Mattress sets
  • Stacked boxes

A 10x10 unit offers flexibility and is one of the most commonly chosen sizes.

If you’re renovating or transitioning between homes, storage can simplify the process. You can learn more in AMS Self Storage – Your Perfect Remodeling Partner.


Large Units (10x15 and Larger)

Ideal for:

  • Multi-room households
  • Larger furniture collections
  • Business inventory
  • Long-term storage needs

If you’re storing inventory or growing a home-based business, review Getting the Most Out of Your Self-Storage Spacefor organization strategies.


Plan for Accessibility

When estimating size, think beyond simply fitting everything inside.

Be sure to leave:

  • Walking space
  • Access to important items
  • Room for future additions

A slightly larger unit often allows for better organization and easier access.


Choosing the Right Fit

Selecting the correct storage unit size doesn’t have to be complicated.

By taking inventory and planning for accessibility, you can confidently choose a unit that supports your needs without wasting space.



AMS Self Storage offers a variety of unit sizes to accommodate everything from a few seasonal items to the contents of an entire home. If you’re unsure which size is right for you, our team is ready to help you find the best fit.

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