The storage unit size you need depends on how much you're storing. As a quick rule: a 5x5 holds a closet's worth of boxes, a 5x10 fits one room, a 10x10 holds a two-bedroom apartment, a 10x15 fits a three-bedroom home, and a 10x20 holds a full house or a vehicle. When you're between sizes, size up — a little extra room makes loading and access far easier.

Below is a size-to-contents guide so you can match your belongings to the right unit on the first try.

Storage Unit Size Chart

How to Figure Out What Size You Need

You don't need to measure every box. Walk through these three steps:

• List the big items first — beds, sofas, dressers, appliances, tables. These take the most space and decide your minimum size.
• Estimate your boxes — count them in groups of ten. Roughly 25–30 medium boxes stack into the footprint of a 5x5.
• Add room to move — if you'll need to reach items in the back, choose the next size up so you can leave an aisle.

Storage Sizes Explained by Situation

Decluttering or storing seasonal items

A 5x5 or 5x10 is usually plenty for holiday decorations, sports gear, or a few pieces of furniture you're not ready to part with.

Moving out of an apartment

A 5x10 handles a studio; a 10x10 comfortably holds a one- or two-bedroom apartment including a couch, bed, dresser, and 15–20 boxes.

Storing a whole house

For a three-bedroom home, plan on a 10x15. For four bedrooms or a home with large appliances and a garage's worth of extras, go with a 10x20.

Storing a vehicle

A 10x20 fits most cars, and larger drive-up or outdoor spaces are available for trucks, boats, and RVs at select facilities.

When in Doubt, Size Up

The most common storage mistake is renting a unit that's slightly too small, then having to cram items in or rent a second space. The price gap between one size and the next is usually $30–$50 a month — often worth it for the room to organize, protect fragile items, and get to what you need without unloading everything.

Not sure which size fits your move? Use the Personal Mini Storage Size Guide or reserve a unit online across our 20 Central Florida locations — with month-to-month terms.

Frequently Asked Questions

What size storage unit do I need for a 2-bedroom apartment?

A 10x10 storage unit (100 square feet) is the right size for a typical two-bedroom apartment. It holds furniture, a refrigerator or washer/dryer, and roughly 15–20 boxes.

What size storage unit do I need for a 3-bedroom house?

A 10x15 storage unit (150 square feet) fits most three-bedroom homes. If you also have large appliances, patio furniture, or a garage full of items, step up to a 10x20.

Is it better to get a bigger or smaller storage unit?

When you're between two sizes, choose the larger one. The cost difference is usually $30–$50 per month, and the extra space makes it far easier to load, organize, and access your belongings.

How many boxes fit in a 5x5 storage unit?

A 5x5 unit (25 square feet) holds roughly 25–30 medium moving boxes, or a mix of boxes and a few small pieces of furniture — about the contents of a large closet.

Storage Size Guide