How to Choose the Right Storage Unit Size in 2026
Jun 29, 2026 / Public Storage
Finding the right storage unit size can save you money, prevent wasted space, and make moving or organizing your belongings much easier. The best storage unit size depends on how many items you need to store, the size of your items, and whether you’re storing household goods, vehicles, boats, or RVs.
What Size Storage Unit Do I Need?
Most people can choose the right storage unit size based on the number of rooms they’re storing. Small storage units (5’x5′ and 5’x10′) work well for boxes, seasonal items, and the contents of a bedroom. Medium storage units (5’x15′ and 10’x10′) are ideal for apartment moves and household furniture. Large storage units (10’x15′ to 10’x25′) can accommodate the contents of a multi-bedroom home. For cars, boats, and RVs, storage space is typically selected based on vehicle length.
Storage Unit Size at a Glance
| Unit Size | Comparable Space | Best For |
|---|---|---|
| Locker | Small closet shelf | Seasonal items, sports gear, luggage |
| 5’x5′ | Large closet | Boxes, small furniture, holiday decorations |
| 5’x10′ | Walk-in closet | Studio apartment contents, dorm items |
| 5’x15′ | Large walk-in closet | Bedroom furniture, apartment storage |
| 10’x10′ | Small bedroom | Two rooms of furniture, apartment moves |
| 10’x15′ | Large bedroom | Two-bedroom home contents |
| 10’x20′ | One-car garage | Three-bedroom home contents |
| 10’x25′ | Large garage | Four-bedroom home contents |
| Vehicle Storage | Varies | Cars, trucks, motorcycles, trailers |
| Boat & RV Storage | Length-based | Boats, campers, motorhomes, RVs |
How to Choose the Right Storage Unit Size
Follow these three steps:
- Take inventory of what you’re storing. Create a list of everything you plan to store, including furniture, appliances, boxes, and oversized items.
- Estimate how many rooms’ worth of belongings you have. Think about how many rooms’ worth of belongings you’ll be storing. A few boxes require significantly less space than the contents of an entire apartment or home.
- Consider future access. If you’ll need regular access to your belongings, leave room for a small walkway inside the unit. While a tightly packed unit may maximize every square foot, extra space can make it easier to organize and retrieve items later.
A unit that is too small can be difficult to organize and access, while a properly sized unit gives you room to stack boxes safely and retrieve items when needed.
Small Storage Units: Best for Everyday Overflow
Small storage units are among the most popular options because they provide additional space without paying for more room than necessary.
Locker Storage
If you only need to store a handful of items, a locker may be all you need. Lockers come in various shapes and sizes and are often used for compact belongings that don’t require much storage space.
Common uses include:
- Seasonal clothing
- Sports equipment
- Travel bags
- Small household items
Think of a locker as an extension of your closet, garage, or storage cabinet.
5’x5′ Storage Units
A 5’x5′ storage unit is approximately the size of a large closet and offers about 25 square feet of floor space.
A 5’x5′ unit is commonly used for:
- Up to 10 moving boxes
- Holiday decorations
- Small furniture pieces
- Bicycles
- Twin or full mattresses
This size works well for homeowners, renters, and apartment dwellers looking to free up space at home.
5’x10′ Storage Units
A 5’x10′ storage unit offers roughly twice the space of a 5’x5′ unit and can often accommodate the contents of a studio apartment.
Typical items stored in a 5’x10′ unit include:
- More than 20 moving boxes
- Queen mattress sets
- Bedroom furniture
- Dorm room belongings
- Small office furniture and equipment
This size is often a good fit for students, renters, and people between moves.
Medium Storage Units: Ideal for Apartment Moves
Medium-sized storage units offer enough room for larger furniture, multiple rooms of belongings, and many apartment-moving situations.
5’x15′ Storage Units
A 5’x15′ storage unit can typically hold the contents of a large bedroom along with additional household items.
Common uses include:
- Around 30 moving boxes
- Bedroom furniture sets
- Dining room furniture
- Seasonal storage
- Renovation projects
This size is often chosen during apartment transitions, home remodeling projects, or temporary relocations.
10’x10′ Storage Units
A 10’x10′ storage unit is one of the most versatile storage sizes available.
Comparable to a small bedroom or roughly half of a one-car garage, it can often accommodate:
- The contents of two bedrooms
- Living room furniture
- Dining room furniture
- Appliances
- Household boxes and storage containers
Because of its flexibility, a 10’x10′ unit is often a popular choice for apartment moves and long-term household storage.
Large Storage Units: Designed for Whole-Home Storage
When you’re storing the contents of an entire home, larger storage units provide the space needed for furniture, appliances, and large quantities of boxes.
10’x15′ Storage Units
A 10’x15′ storage unit can typically accommodate the contents of a two-bedroom home.
Common uses include:
- Large furniture sets
- Appliances
- Business inventory
- Home organization projects
- Temporary storage during moves
10’x20′ Storage Units
A 10’x20′ storage unit offers approximately 200 square feet of storage space and is often compared to a one-car garage.
This size can commonly hold:
- The contents of a three-bedroom home
- Large appliances
- Patio furniture
- Dozens of moving boxes
- Garage items and equipment
Many customers choose this size during home sales, major renovations, and long-distance relocations.
10’x25′ Storage Units
A 10’x25′ storage unit is among the largest standard storage options available.
It can often accommodate:
- The contents of a four-bedroom home
- Large furniture collections
- Appliances
- Estate storage
- Long-term household storage
This size is frequently selected for major moves, whole-home renovations, and large storage projects.
Vehicle Storage: More Than Just Household Items
Many storage facilities offer dedicated vehicle storage spaces for:
- Cars
- Trucks
- Motorcycles
- ATVs
- Trailers
Vehicle storage can be helpful if:
- You don’t have enough parking space at home
- HOA or community rules limit vehicle parking
- You need seasonal vehicle storage
- You’re traveling for an extended period
Most standard passenger vehicles fit in storage spaces up to 20 feet long, while larger vehicles may require additional space.
Boat and RV Storage: Choosing the Right Length
Boat and RV storage is typically selected based on vehicle length.
Before reserving a space, measure your vehicle from end to end, including:
- Hitches
- Bumpers
- Spare tire mounts
- Bike racks
- Other accessories
Storage spaces are commonly used for:
- Camper vans
- Motorhomes
- Towable campers
- Fishing boats
- Pontoon boats
When in Doubt, Size Up
One of the most common storage mistakes is choosing a unit that’s slightly too small. While a smaller unit may seem more cost-effective initially, an overcrowded space can make it difficult to organize belongings and access items when needed.
If you’re between sizes, consider:
- Whether you’ll add more items later
- How often you’ll need access
- Whether you want room to create walkways inside the unit
A little extra space can make loading, unloading, and organizing significantly easier.
