September 16, 2026

What Size Storage Unit Do I Need? A Guide to Choosing the Right Storage Unit

Not sure what size storage unit you need? From 5×5 units to larger storage spaces, this guide will help you understand your options and choose the right amount of storage for your belongings.

Choosing the right storage unit size can feel a little like trying to pack a moving truck before you know how much you actually have. Too small, and you may find yourself running out of room. Too large, and you may end up paying for space you don’t really need. The good news is that choosing a storage unit doesn’t have to be difficult. The best size depends on what you’re storing, how much you have, and how you plan to access your belongings. Whether you’re moving, renovating, downsizing, decluttering your home, storing seasonal items or making room for your business, a little planning can help you choose the right amount of space.

Start by Making a List of What You Need to Store

Before choosing a storage unit, take a quick inventory of the items you plan to put into storage. Think about things such as: • Furniture, including beds, dressers, tables and chairs • Appliances • Moving boxes and totes • Seasonal decorations • Patio furniture and outdoor equipment • Sporting equipment • Tools and business equipment • Household items you’re not currently using • Items you need to store while renovating or selling your home Don’t forget to consider the larger or awkwardly shaped items. A few pieces of furniture can take up considerably more space than several neatly stacked boxes.

What Storage Unit Size Do I Need?

Storage units come in a variety of sizes, and the right choice will depend on your particular belongings.

5×5 Storage Units

A 5×5 unit provides 25 square feet of floor space and can be a good option when you need a smaller amount of storage. It may be suitable for boxes, totes, seasonal decorations, smaller household items or belongings that you don’t need to access frequently. If you’re decluttering one room, storing seasonal items ie. winter tires, skis, bicycles or simply need to free up some space at home, a smaller unit may be all you need.

5×9 Storage Units

A 5×9 unit provides 45 square feet of floor space, giving you considerably more room while still keeping the footprint relatively compact. This size can be useful when you’re storing a combination of boxes and household belongings, furniture from a smaller space, or items you’re temporarily moving out of the way during a renovation or move.

5×10 Storage Units

A 5×10 unit provides 50 square feet of floor space and is a popular choice for a variety of storage needs. It can work well for larger quantities of boxes, furniture and household belongings, or for people who need some extra room without moving into a much larger unit. The important thing to remember is that floor space isn’t the only consideration. How efficiently you pack the unit and how often you need to access your belongings can make a big difference.

Think About How You’ll Use Your Storage Unit

The amount you’re storing isn’t the only factor to consider. Ask yourself: Will I need to get into the unit regularly? If you’re storing items that you won’t need for several months, you may be able to pack more efficiently. If you’ll be visiting frequently, however, you’ll want to leave enough room to move around and reach the things you need. For example, someone storing holiday decorations for the season may pack the unit differently than someone who is storing household belongings during a renovation. Will I be adding more items later? If you’re in the middle of a move, renovation or downsizing project, you may not know exactly how much you’ll eventually need to store. Leaving yourself a little flexibility can make the process easier.

Don’t Forget About Access

A storage unit isn’t just about how much you can fit inside. How easily you can get your belongings in and out matters, too. If you know you’ll be accessing your storage regularly, consider how you want to organize the unit. Leave space where possible to reach the items you’ll need most often and avoid burying frequently used belongings behind everything else. At Heated Self Storage, we offer both indoor heated storage units and outdoor drive-up storage options, depending on your needs and the type of items you’re storing.

Not Sure What Size You Need? Try Our Storage Calculator

Still trying to figure out how much space you’ll need? Our Storage Calculator can help. Simply enter the items you plan to store, and the calculator will provide an estimate of the space required. It’s a helpful starting point if you’re moving, renovating, downsizing or simply trying to determine how much storage space your belongings will take. USE OUR STORAGE CALCULATOR Keep in mind that the calculator provides an estimate. The actual amount of space you’ll need can vary depending on the size and shape of your belongings, how they’re packed and how much room you want for access.

The Right Storage Unit Is the One That Fits Your Needs

There’s no single storage unit size that’s right for everyone. The best choice depends on what you’re storing, how much you have and how often you’ll need to access it. Taking a little time to sort your belongings and think about how you’ll use your storage space can make choosing a unit much easier. And if you’re still unsure, that’s okay. You don’t have to figure it all out on your own. At Heated Self Storage in Orillia, we’re happy to help you look at your storage needs and determine what type and size of space may work for you. Have questions about storage? Give us a call or come see us. We’d be happy to help.