Choosing the correct mini storage container is one of the best decisions you will ever make when purging/decluttering.
Choose too large and you’ll be spending money on wasted space. Choose too small and you’ll find yourself cramming way too much into your unit. Use this mini storage unit size guide to help you choose the right size every time.
With the right approach, you can:
- Avoid paying for space you don’t need
- Fit everything without stacking to the ceiling
- Save money every month
Here’s how to do it…
In this guide:
- Why Mini Storage Size Matters
- The Most Common Mini Storage Unit Sizes
- How To Match Your Stuff To The Right Size
- Pro Tips To Save Money On Storage
Why Mini Storage Size Matters
The self-storage industry is massive right now and growing fast.
Self storage has become a $45.41 billion industry in 2025 and there are plenty of families utilizing this service. Even 16% of Americans own their own storage unit due to needing more space at home.
Why is everyone renting storage?
Apartments come in smaller sizes. Families come in larger sizes. And life just seems to grow… Why Size Matters. You want your furniture and memorabilia to fit, without paying too much each month.
For those of you that are unfamiliar, here’s a helpful link to small storage units that visually explains what will fit in what.
Here’s the thing:
Too large a unit wastes money. Too small and you’ll pack up to the rafters. Order properly and save yourself time and headaches.
That’s a win-win-win.
The Most Common Mini Storage Unit Sizes
There are a few common sizes when it comes to mini storage units. Let’s discuss each one.
5×5 Storage Unit
This is the smallest mini storage unit. It’s about the size of a closet.
A 5×5 unit gives you 25 square feet of space. It’s perfect for:
- Seasonal items like holiday decorations
- Small boxes of clothes or books
- Small furniture like a chair or nightstand
- Sports gear or hobby supplies
Perfect size for college kids or anyone who needs a place to hide a couple things.
5×10 Storage Unit
A 5×10 is twice as big as a 5×5. It provides you with 50 sqft of space.
It’s roughly the size of a large walk-in closet. This is probably the most popular mini storage unit size. It’s great if you need to store the contents of a small bedroom. You have room for a queen mattress, a dresser, 10-15 boxes, and some small appliances.
10×10 Storage Unit
The 10×10 is the most popular storage unit size for renters across the country.
It provides you with 100 square feet of space and can accommodate everything you would normally need to store from a 1-2 bedroom apartment. Things you can store:
- Furniture from two bedrooms
- A living room set
- Appliances like a fridge or washer
- 20-30 boxes
This size is great for families moving between homes or storing items during renovation.
How To Match Your Stuff To The Right Size
So how do you figure out which mini storage size is right for you?
Make A List Of Everything
Start by writing down every item you plan to store.
Easy right? Wrong. Most people don’t take time to do this and just guess. DON’T GUESS… Having everything written down helps you see how much room you will need. Categorize your items too. Furniture, Boxes, Appliances, Odd-Shaped items (i.e. bikes, mirrors etc.)
Estimate The Square Footage
A good rule of thumb is:
- Studio apartment = 5×5 or 5×10
- 1-bedroom apartment = 5×10 or 10×10
- 2-bedroom apartment = 10×10
- 3-bedroom home = 10×15 or larger
Boxes and furniture can be stacked vertically, too. Most units have 8 foot ceilings. Take advantage of the space.
Think About Access
How often will you need to grab things from your unit?
If it’s long-term storage, pack the unit full front to back. If you’ll be accessing it frequently, keep a walkway down the middle so you can get to everything without having to unpack.
Pro Tips To Save Money On Storage
Storage rates have been fluctuating recently which means there are great deals to be had. Asking rent decreased 10.7% year-over-year in the fourth quarter of 2025, so now is the time to score a great deal.
Here are some great ways to save:
Pack Boxes Efficiently
Try to use boxes that are all the same size. It makes stacking easier and allows you to better maximise height.
Disassemble Furniture
Disassemble furniture where possible. Beds frames, tables and shelving units are much smaller when they are flat packed. Store screws for each piece in a labelled bag taped to it.
Choose The Right Location
Storage rates can differ greatly depending on where you live. You could pay twice as much for a unit in a large city than a suburb 20 minutes outside of. Consider driving that extra 20 minutes if you don’t need daily access.
Ask About Promotions
Many places have first month free promotions, discounts for paying up front, military or student discounts, referral bonuses. Always ask what incentives they have before you sign.
Final Thoughts
Picking the right mini storage size doesn’t have to be complicated.
You just need to know what you’re storing and pick the appropriate unit. Here’s a fast track refresher:
- Make a complete list of items to store
- Estimate the total square footage needed
- Pick a size based on apartment/home size
- Pack efficiently to maximise space
- Shop around for the best price
By following this guide, you’ll find the perfect unit on the first try.
Frequently Asked Questions:
The standard smallest mini storage space is a 5×5 storage unit. This provides you 25 square feet to store your items. Think of it like having a small closet. This size is ideal for seasonal decorations, extra furniture, or a few boxes.
Storage units that are typically sufficient for one bedroom apartments are a 5×10 or a 10×10. A 5×10 has space to hold the contents of one bedroom. A 10×10 will work if your apartment is on the smaller side and you need to include living room furniture as well.
Renting a climate-controlled storage unit is worth it if you have temperature or humidity-sensitive belongings. Electronics, wooden furniture, photos, art, and musical instruments can all be damaged if exposed to extreme temperatures.
