Pick the unit that fits your stuff, not the one that only fits your guess.
If you have ever stood in the middle of a half-packed room and tried to imagine square footage, you are in good company. Storage sizes are much easier to understand when you picture real furniture, real boxes, and the kind of move you are actually making.
At Severna Office and Storage in Millersville, most storage conversations start with the same honest question: “How much room do I really need?” The answer depends on what you are storing, how carefully it is packed, and whether you want room to walk inside the unit later.
This guide gives you a practical, plain-English way to compare 5×10, 10×10, 10×15, and 10×20 storage units. It is not meant to make you rent more space than you need. It is meant to help you avoid the two classic headaches: renting too small and having to repack everything, or renting so large that you pay for empty air.
Quick rule of thumb: if you need to access items throughout the season, choose a little more room than the tightest possible fit. A narrow aisle can save a lot of future digging.
Storage unit size comparison
| Unit size | Approximate space | Best fit | Good for |
|---|---|---|---|
| 5×10 | About 50 square feet | A walk-in closet or small spare room | Boxes, small furniture, dorm storage, tools, seasonal items, a mattress set |
| 10×10 | About 100 square feet | A small bedroom | A one-bedroom apartment, several rooms of furniture, appliances, business supplies |
| 10×15 | About 150 square feet | A large bedroom | Two bedrooms, larger furniture, contractor equipment, inventory overflow |
| 10×20 | About 200 square feet | A small one-car garage | Multi-room moves, garage cleanouts, office furniture, larger household transitions |
What fits in a 5×10 storage unit?
A 5×10 unit is a smart choice when you are not storing a whole household, but you do need more than a few boxes in the basement. Picture a walk-in closet with enough room for stacked boxes, a mattress set, a dresser, a small sofa, chairs, totes, holiday decorations, sports gear, or tools.
Dorm room storage, seasonal decorations, extra business files, small furniture, and a partial room cleanout.
You have a full couch, dining set, several bookcases, or many bulky plastic bins. Those eat space faster than people expect.
If you are moving from a small apartment and own only the basics, a 5×10 might work with careful packing. If you want room to open boxes later, a 10×10 will usually feel less cramped.
What fits in a 10×10 storage unit?
A 10×10 is one of the most popular storage sizes because it gives you a useful middle ground. It is commonly used for the contents of a one-bedroom apartment, a few rooms of furniture, appliances, boxes, small office items, or a mix of household and business storage.
Bedroom furniture, a sofa, coffee table, chairs, lamps, boxes, shelves, small appliances, and office overflow.
You are storing large sectionals, a full dining room, garage tools, and bedroom sets all at once. That can push you toward a 10×15.
For many local moves around Millersville, Severna Park, Severn, Odenton, and Pasadena, the 10×10 is the size people ask about first. It is also a good companion if you are using a U-Haul truck rental in Millersville and want to keep the move simple.
What fits in a 10×15 storage unit?
A 10×15 gives you breathing room. It can often handle the contents of a two-bedroom apartment or a small house, especially if furniture is broken down and boxes are stacked well. It is also useful for local businesses that need inventory, supplies, records, tools, or display materials out of the way but still nearby.
Two bedroom sets, a living room, boxed kitchen items, patio furniture, contractor supplies, or business inventory.
You need to store nearly everything from a larger home, plus garage items. A 10×20 may save you from stacking too tightly.
This is the size to consider when you are between “just a few rooms” and “the whole house is coming with us.” It can also be a practical overflow solution for someone using a small office rental in Millersville and trying to keep the workspace tidy.
What fits in a 10×20 storage unit?
A 10×20 unit is roughly the size of a small one-car garage. It is often used during bigger moves, estate cleanouts, remodeling projects, or situations where several rooms of furniture need to be stored at once.
Multiple bedroom sets, living room furniture, dining furniture, appliances, garage items, office furniture, and many boxes.
You are trying to store a vehicle, trailer, or unusually large equipment. Always call first to confirm what is allowed and what fits.
If you are making a larger move and want to unload once without playing furniture Tetris, a 10×20 can be the calmer choice. It also gives you more flexibility to create aisles, label zones, and keep frequently needed items near the front.
How to choose between two storage unit sizes
If you are between two sizes, think about how you will use the unit after move-in day. If everything is going into storage and staying there untouched for months, you can pack more tightly. If you will stop by to grab tools, holiday bins, records, supplies, or furniture, leave yourself room to move.
A simple decision checklist
- Choose the smaller size if your items are boxed well, furniture is disassembled, and you do not need frequent access.
- Choose the larger size if you have bulky furniture, odd-shaped items, or want an aisle down the middle.
- Measure the awkward pieces before you decide. Sectionals, mattresses, desks, and shelving units can change the answer.
- Put heavy boxes on the bottom and keep lighter items up top. It protects your things and makes stacking safer.
- Label at least two sides of each box so you can still read the label after the unit is packed.
Think about truck size at the same time
Storage unit size and moving truck size go hand in hand. If you rent a truck that is too small, you may lose half a day making extra trips. If the truck is far bigger than needed, your load can shift more unless it is tied down well.
For a local move, it often helps to pick the storage unit first, then compare the truck size to the amount you are actually moving. If you are not sure, our U-Haul truck size guide for Millersville is a good next read.
One local tip: plan for what happens after the door closes
The best storage unit is not only the one that holds everything. It is the one you can live with later. Keep the items you may need soon near the front. Make a small aisle if possible. Put a simple list on your phone with the rough location of important bins. Future you will be grateful, and future you is usually the one standing there in the rain trying to find the winter coats.
Want help choosing a storage size?
Tell us what you are storing, and we can help you think through the right fit before you start loading the truck.
Storage unit size FAQs
What size storage unit do I need for a one-bedroom apartment?
A 10×10 is often a good starting point for a one-bedroom apartment. If you have less furniture and mostly boxes, a 5×10 may work. If you have bulky furniture or want easier access, consider a 10×15.
Can a queen mattress fit in a 5×10 storage unit?
Yes, a queen mattress can usually fit in a 5×10 storage unit. Use a mattress cover, keep it protected, and avoid stacking heavy items directly on top of it.
Is a 10×10 big enough for a couch and bedroom furniture?
Often, yes. A 10×10 can usually hold a couch, bedroom furniture, boxes, and smaller household items if everything is packed carefully. Larger sectionals or extra rooms may need more space.
Should I rent a larger storage unit if I need access to my things?
Usually, yes. If you plan to visit the unit and pull items out, a little extra space for an aisle is worth it. A tightly packed unit is fine for long-term storage, but it can be frustrating for frequent access.
Where can I ask more storage questions?
You can visit our self storage FAQ page or contact Severna Office and Storage for help with your specific situation.
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