What Size Storage Unit Do You Need?

The right storage unit size depends on what you plan to store and how it's organized. A 5x5 storage unit works for boxes, seasonal items, and closet overflow. A 10x10 storage unit fits a one-bedroom apartment. A 10x20 storage unit holds a three-bedroom home, and a 10x30 storage unit handles a large home or business inventory. If you're between sizes, choosing the larger size gives more breathing room for getting items in and out.

A 5x5 storage unit is roughly the size of a walk-in closet (25 square feet). It holds about 25 standard moving boxes, seasonal decorations, a small dresser, photo albums, documents, and small sporting equipment. It's the right call for apartment renters with extra stuff, college students between semesters, and document or photo archives.

A 10x10 storage unit is 100 square feet — enough for the contents of a one-bedroom apartment. It typically holds a queen bedroom set, a living room set, a major appliance, 15 to 20 boxes, and a flat-screen TV. It's the most popular size at Modern Storage® because it balances space and price for most household moves and downsizing situations.

A 10x20 storage unit is 200 square feet — equivalent to a one-car garage. It fits the contents of a three-bedroom home: full living, dining, and three bedroom sets, major appliances, garage contents and tools, patio furniture, and up to 75 boxes. It's a common pick for three-bedroom home moves, whole-home renovations, and military PCS moves.

Yes, at select Modern Storage® locations. A 10x20 storage unit fits a smaller car or motorcycle. A 10x30 storage unit can accommodate a larger vehicle, a small boat, or a trailer. For RV and boat storage specifically, see the Boat & RV Storage page — five Modern Storage® locations (Lowell, Shackleford, Bentonville, Springdale, Maumelle) offer outdoor and covered vehicle parking sized for longer rigs.

It happens often — and it's an easy fix. Modern Storage® rentals are month-to-month, so if a 5x10 turns out too small, you can move up to a 10x10 at the same facility without breaking a contract. Use the AI Size Finder tool on this site for a personalized recommendation, or call the local Modern Storage® team and we'll help size you right the first time.

Most Modern Storage® locations offer climate-controlled units in 5x5 through 10x20 sizes, with 10x30 availability varying by facility. Climate-controlled storage keeps temperature and humidity more stable than an outdoor unit — the right call for furniture, electronics, documents, photos, art, and instruments. See the Climate-Controlled Storage page for the full breakdown.