Trying to figure out what size storage unit you need? Whether you’re decluttering, moving, or just tired of tripping over boxes in your garage, choosing the right unit size can be surprisingly confusing. That’s why we’ve created this essential storage unit size guide so you don’t end up with too much space… or not nearly enough.
At Modern Storage®, we hear this question constantly:
“What fits in a 5×5? Is a 10×10 big enough? What if I need to store a whole house… or just my sneaker collection?”
In a recent episode of Modern Storage® Unpacked, host Hannah and storage expert Caleb broke down all the most common unit sizes, what fits inside each one, and what mistakes to avoid. Spoiler alert: honesty is the best policy, and yes, vertical space matters. Picking the wrong size can cost you time, money, and a lot of sweat. Use this storage space estimator to make a smart, efficient choice the first time around no guesswork, no wasted space.
Let’s unpack what they had to say and help you find your perfect storage fit.
Unit Size Breakdown
5×5 – Best for Small Items & Seasonal Storage
5×10 – The Right Size for a Studio Apartment or Dorm
10×10 – The Most Popular Unit Size for a Reason
10×15 – When You Need That Extra Breathing Room
10×20 – For Full Homes and Small Vehicle Storage|
10×25 – Business-Ready or Big Family Approved
5×5 Storage Unit: The Hall Closet Vibe
Best for: Students, collectors, minimalist kings and queens
Picture a standard hall closet. That’s your 5×5. You’re not getting a sectional in there but you can store:
- Seasonal clothes
- Boxes of books or toys
- Small shelving units
- A couple of suitcases
- Sports gear or collectible kicks
Pro Tip: Don’t forget the vertical space. Stack your boxes like Tetris and you’re golden.
5×10 / 10×5: The “Just Enough Room” Option
Best for: Dorm room cleanouts, walk-in closet vibes
Think of this as a generous walk-in closet enough room for a twin or full bed, a small dresser, and some extra boxes. Just note the layout matters:
- 5×10: deeper space with a smaller door
- 10×5: wider entry better if you need frequent access
Either way, you can fit small appliances, kids’ furniture, or a growing Etsy business inventory.
10×10: America’s Sweetheart of Storage
Best for: 1–2 bedroom apartments, starter home storage
The 10×10 is the Beyoncé of storage units everyone wants it, and it fits just right. It’s incredibly versatile:
- Bedroom set
- Living room set
- A washer/dryer
- Several boxes
- Office gear or seasonal decor
And yes, you can actually walk in and see your stuff. Huge win.
10×15: The Breathing Room You Didn’t Know You Needed
Best for: 2–3 bedroom homes, renovations, big furniture
You’ll feel the size difference stepping up from a 10×10. Suddenly, that bulky dining table or grandma’s China cabinet fits comfortably. Ideal for:
- Larger sectionals
- Dining sets
- Multiple mattresses
- Outdoor equipment
Perfect if you’re in renovation mode or just want to avoid the dreaded “Tetris shuffle” every time you need a box.
10×20: The Family-Sized Favorite
Best for: Full 3–4 bedroom home storage, small vehicles, or trailers
This one’s half garage, half magic. It’s got the depth for:
- Large furniture sets
- Appliances
- Garage tools
- Even a small car or motorcycle (hello, climate-controlled parking)
If you’ve ever moved out of a home with an attic and basement this is probably your new best friend.
10×25: The Big Boss Unit
Best for: Full home storage, business use, or that giant truck you snuck past your spouse
This unit fits the whole enchilada furniture, appliances, garage junk, seasonal decor, contractor tools, staging equipment, you name it.
You’re an adult now. You’ve got stuff. This is the storage unit that keeps it safe and out of your way.
Tips from Our Storage Pros
1. Be honest about what you’re storing.
Seriously, we’re not judging you. You’re not on trial. Tell us what’s going in the unit so we can help you pick the right size (and save you from hauling your stuff across the property in July).
2. Take the tour.
Don’t rent blind. Step inside a demo unit, bring your measuring tape, or pull up with your trailer. We’ll help you test it out.
3. Use the Modern Storage® Storage Calculator.
Not a people person? Hate phone calls? Our online calculator lets you plug in your stuff couches, beds, boxes, and all and tells you what size you need.
4. Leave space to walk.
Especially for business users or frequent access. Build aisles, use shelving, and think about your future self trying to reach that one box in the back.
5. Go up or down anytime.
Storage with us is month-to-month and flexible. Need a smaller size? Great. Need to level up? We got you. No lost money just simple transfers and credit toward your next unit.
FAQs We Hear All the Time
Can I rent short-term?
Yes! Modern Storage® offers month-to-month leases. Use it for two weeks or two years we’re chill either way.
What if I don’t know how long I’ll need it?
No stress. Go month to month. Just give us 10 days’ notice when you’re ready to move out.
Can I store a car or trailer?
Yep in select drive-up units like the 10×20 or 10×25. Bring it in and we’ll test the fit together.
Your Storage Journey Starts Here
At Modern Storage®, we don’t just rent boxes we help you make space for what matters. Whether you’re moving, renovating, downsizing, launching a business, or just trying to get that treadmill out of your garage, we’ve got your back.
📍 Find a Modern Storage® location near you
🧮 Try our storage calculator
📞 Or just call us. We’re real humans who care about your stuff.
Still asking yourself, “What size storage unit do I need?” Don’t sweat it. Use our free Storage Calculator Tool to enter your items and get a visual estimate of the exact space you’ll need. Prefer the personal touch? DM us, stop by for a tour, or cruise the property in one of our golf carts with a Modern Storage® expert. (Yes, we’ve got free Starbucks and cold water ready for you.)
Ready to store smart? Subscribe to our podcast Modern Storage® Unpacked and follow us for more tips on all things storage, space-saving, and decluttering life like a pro.
