What Size Storage Unit Do I Need? A Simple Guide to Finding the Right Fit


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July 31st, 2025


If you’ve ever packed for a trip and realized halfway through that your suitcase is too small (or way too big), you already know how tricky it can be to estimate space. The same goes for choosing the right size storage unit. Whether you're moving, decluttering, or just need extra space, picking a unit that fits your needs, without overpaying for unused space, is key. Here’s a simple guide to help you figure it out, no measuring tape required.

Why Storage Unit Size Matters

Choosing the right size storage unit can save you money, reduce stress, and protect your belongings. Too small, and you’ll end up frustrated (or renting a second unit). Too big, and you’re paying for empty space you don’t need. Our goal is to help you find the right size.

The Most Common Storage Unit Sizes (And What Fits Inside)

Here’s a breakdown of the most popular storage unit sizes and what you can typically fit in each:

5x5 (25 sq. ft.) – “Hall Closet”

Perfect for:
  • A few boxes
  • Seasonal items (holiday decorations, winter coats, etc.)
  • Small furniture (end tables, lamps)
  • Office supplies or small file cabinets
This is ideal if you’re just looking to declutter or need a little extra space for personal items.

5x10 (50 sq. ft.) – “Walk-in Closet”

Great for:
  • Studio apartment or dorm room contents
  • A mattress set, dresser, and several boxes
  • Sporting gear, bikes, or tools
This is a common choice for students or anyone downsizing for a short time.

10x10 (100 sq. ft.) – “Half a Garage”

Fits:
  • Contents of a 1-bedroom apartment
  • Large appliances like a refrigerator or washer/dryer
  • Furniture (couch, dining table, mattress sets)
One of our most popular sizes, great for both short-term and long-term use.

10x15 (150 sq. ft.) – “Large Bedroom”

Perfect for:
  • 2–3 rooms worth of furniture
  • Large appliances and boxes
  • Business inventory or equipment
Ideal for families in transition or small business owners needing extra inventory space.

10x20 (200 sq. ft.) – “Standard Garage”

Fits:
  • Contents of a 2–3 bedroom home
  • A vehicle, or large equipment
  • Furniture, outdoor gear, and more
Moving homes or remodeling? This is your go-to.

How Do You Know What Size You Need?

Here are a few simple questions to ask yourself before you book:

1. What are you storing?

Make a quick list of the large items first, like couches, mattresses, appliances, and shelving units. Then add in boxes, bins, or anything oddly shaped (like lamps or bikes). If you’re just storing clothing and decor, you can probably go smaller than you think.

2. Will you need to access your stuff often?

If you plan to grab things regularly (like business inventory or seasonal decorations), go a little bigger. This gives you space to walk in, move around, and keep things organized.

3. Are your items fragile or bulky?

Fragile items often need room to be packed and protected properly. You’ll want to avoid stacking them or cramming them into tight spaces. The same goes for bulky furniture or equipment, measure and consider a size up if necessary.

4. Is this a short-term or long-term solution?

For long-term storage, it’s better to leave a little extra room for air circulation and future items. If it’s short-term and you’re okay with packing things tightly, you can likely go smaller.

Pro Tip: Do a “Trial Run” at Home

Try stacking your items in one room (or your garage) and measure the footprint. You might be surprised how much, or how little, space you actually need. If you're still unsure, our team at Arcadia Self Storage is always happy to help.We also recommend checking out our Size Guide or stopping by the facility in Arcadia, CA. Our local staff can show you the units in person and help you visualize what will work best.

Avoid These Common Sizing Mistakes

  • Don’t underestimate how many boxes you have. They add up fast!
  • Avoid renting a unit that’s too small “just to save money.” You could end up having to rent a second unit or risk damaging your stuff from over-packing.
  • Remember vertical space. Most units are at least 8 feet tall, which means you can stack, just make sure it’s safe to do so.

Ready To Get Started?

Choosing a storage unit size doesn’t have to be overwhelming. Think about what you’re storing, how often you’ll need access, and whether you’ll be adding more in the future. When in doubt, it’s worth a quick chat with someone who knows the ropes.At Arcadia Self Storage, we take pride in making your storage experience as easy and stress-free as possible. Whether you're storing a few boxes or an entire household, our team is ready to help you find the perfect fit. Ready to get started? Give us a call at(626) 447-7722 or stop by to speak with a friendly team member today. We’re always here when you need a little extra space.


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