What Size Storage Unit Do I Need? Simple Storage Unit Size Guide

What Size Storage Unit Do I Need? Simple Storage Unit Size Guide


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Choosing the right storage unit can feel confusing, especially if you have never rented one before. You may be wondering: What size storage unit do I need? Is a 5x10 big enough? Do you need a 10x10? What if you are storing furniture, boxes, business inventory, or the contents of an entire home?

The good news is that finding the right storage unit size is easier when you know what each unit typically holds. This simple storage unit size guide will help you compare common unit sizes, understand what fits inside each one, and choose the best option for your move, renovation, downsizing project, or extra storage needs.

Whether you need short-term storage during a move or long-term space for furniture, seasonal items, or business supplies, this guide will help you make a confident choice.

Why Choosing the Right Storage Unit Size Matters

Picking the right storage unit size can save you time, money, and stress. If you rent a unit that is too small, you may have to upgrade later or cram items in unsafely. If you choose a unit that is too large, you may end up paying for space you do not need.

The right storage unit should give you enough room for your belongings while still allowing space to move around, stack boxes, and access important items.

Before you rent, think about:

  • How many items do you need to store
  • Whether you are storing large furniture or mostly boxes
  • How long you plan to use the unit
  • Whether you need access to items while they are stored
  • Whether you may add more items later

A little planning up front can help you choose the best storage unit size the first time.

5x5 Storage Unit: Best for Small Storage Needs

A 5x5 storage unit is about the size of a small walk-in closet. It is one of the smallest storage unit options and is ideal for customers who only need a little extra space.

What Fits in a 5x5 Storage Unit?

A 5x5 unit can typically hold:

  • Small boxes
  • Seasonal decorations
  • Clothing bins
  • Sports equipment
  • Small furniture pieces
  • Lamps
  • Office supplies
  • Dorm room items
  • Tools or gardening supplies

Best For:

A 5x5 storage unit is a good choice for students, apartment renters, or anyone who needs to clear out a closet, spare room, or small office. It is not usually large enough for major furniture sets, but it works well for compact storage.

5x10 Storage Unit: Great for Studio Apartments or Extra Furniture

A 5x10 storage unit is about the size of a large walk-in closet or small bedroom. This size gives you more flexibility and is one of the most popular choices for people storing the contents of a small apartment or several pieces of furniture.

What Fits in a 5x10 Storage Unit?

A 5x10 unit can typically hold:

  • A queen mattress set
  • Dresser
  • Small couch or loveseat
  • Chairs
  • Boxes
  • Small appliances
  • Bicycles
  • Patio furniture
  • Business supplies

Best For:

A 5x10 storage unit is ideal for storing items from a studio apartment, college dorm, or small bedroom. It is also a great option if you are moving, decluttering, or need temporary storage for extra furniture.

10x10 Storage Unit: Good for a One-Bedroom Apartment

A 10x10 storage unit is about the size of an average bedroom. This is one of the most commonly rented storage unit sizes because it can hold a significant amount of furniture and boxes without being too large.

What Fits in a 10x10 Storage Unit?

A 10x10 unit can typically hold:

  • Bedroom furniture
  • Living room furniture
  • Mattress sets
  • Dining table and chairs
  • Boxes and storage bins
  • Small appliances
  • Desks
  • Bookshelves
  • Electronics

Best For:

A 10x10 storage unit is a strong choice for a one-bedroom apartment, small home, or larger decluttering project. If you are asking, “What size storage unit do I need for a one-bedroom apartment?” a 10x10 is often the right starting point.

This size also works well for people who want extra room to access their belongings while they are in storage.

10x15 Storage Unit: Ideal for a Two-Bedroom Apartment

A 10x15 storage unit provides more space for larger furniture, appliances, and multiple rooms of belongings. It is about the size of a large bedroom and can hold the contents of many two-bedroom apartments.

What Fits in a 10x15 Storage Unit?

A 10x15 unit can typically hold:

  • Multiple bedroom sets
  • Living room furniture
  • Dining room furniture
  • Major appliances
  • Boxes
  • Office furniture
  • Large shelves
  • Outdoor equipment

Best For:

A 10x15 storage unit is ideal for families, renters, or homeowners who need to store the contents of a two-bedroom apartment or small house. It is also useful during home renovations, staging, or downsizing.

If you have larger furniture or want space to create an aisle inside your unit, a 10x15 may be a better choice than a 10x10.

10x20 Storage Unit: Best for a Multi-Room Home

A 10x20 storage unit is about the size of a standard one-car garage. This larger unit is designed for people storing the contents of a multi-room home, large furniture sets, appliances, or even some vehicles, depending on facility rules and availability.

What Fits in a 10x20 Storage Unit?

A 10x20 unit can typically hold:

  • Furniture from a two- to three-bedroom home
  • Large appliances
  • Multiple mattress sets
  • Couches and sectionals
  • Dining room sets
  • Boxes and bins
  • Garage items
  • Outdoor furniture
  • Business inventory

Best For:

A 10x20 storage unit is a good fit for moving, remodeling, military relocation, estate storage, or storing the contents of a house. If you are between homes or need a larger temporary storage solution, this size gives you plenty of room.

10x30 Storage Unit: Maximum Space for Large Moves or Business Storage

A 10x30 storage unit is one of the largest common storage unit sizes. It is similar to an oversized garage and can hold the contents of a large home or serve as business storage for equipment, supplies, or inventory.

What Fits in a 10x30 Storage Unit?

A 10x30 unit can typically hold:

  • Contents of a large home
  • Multiple bedroom sets
  • Living room and dining room furniture
  • Major appliances
  • Large quantities of boxes
  • Business inventory
  • Equipment
  • Seasonal commercial items

Best For:

A 10x30 storage unit is best for large moves, major renovations, business storage, or customers who need maximum space. If you are storing items from a three- to five-bedroom home, this may be the right size.

How to Choose the Right Storage Unit Size

Still wondering what size storage unit you need? Start by making a quick list of everything you plan to store. Include furniture, boxes, appliances, outdoor items, tools, and anything oversized.

Then ask yourself these questions:

1. Are You Storing Mostly Boxes or Large Furniture?

Boxes can usually be stacked, which helps save space. Large furniture, appliances, and oddly shaped items require more room. If you have couches, mattresses, dining tables, or appliances, consider sizing up.

2. Do You Need to Access Items Often?

If you plan to visit your storage unit regularly, choose a slightly larger unit so you can create a walkway. This makes it easier to reach boxes and furniture without unpacking the entire unit.

3. Will You Add More Items Later?

Many customers rent storage during a move, renovation, or decluttering project and later realize they need to store more items. If there is a chance you will add belongings over time, choose a unit with extra space.

4. Are You Storing Delicate or Valuable Items?

If you are storing wood furniture, electronics, documents, photos, antiques, or other sensitive items, consider whether climate-controlled storage is available. Climate-controlled units can help protect belongings from extreme temperature changes.

5. Are You Moving From an Apartment or a House?

As a general guide:

  • Studio apartment: 5x10
  • One-bedroom apartment: 10x10
  • Two-bedroom apartment: 10x15
  • Two- to three-bedroom home: 10x20
  • Large home or business storage: 10x30

These are general estimates, so your ideal size may vary depending on how much furniture and how many boxes you have.

Tips for Maximizing Your Storage Unit Space

Once you choose the right storage unit size, packing it correctly can help you get the most out of your space.

Here are a few helpful storage tips:

  • Use boxes of similar sizes so they stack easily
  • Place heavy boxes on the bottom and lighter boxes on top
  • Disassemble beds, tables, and shelves when possible
  • Store mattresses upright to save floor space
  • Use furniture drawers to hold smaller items
  • Label every box clearly
  • Leave an aisle if you need regular access
  • Keep frequently used items near the front
  • Cover furniture to protect it from dust

Good organization can make even a smaller storage unit feel much more spacious.

Should You Choose a Larger Storage Unit?

When in doubt, it is often better to choose a slightly larger storage unit than one that is too small. A little extra space can make moving in easier, reduce the risk of damage, and give you room to organize your belongings.

You may want to size up if:

  • You are storing fragile items
  • You need frequent access
  • You have large furniture
  • You are unsure how many boxes you will have
  • You plan to add more items later
  • You want room for an aisle

The right storage unit should fit your belongings comfortably, not force you to stack everything from floor to ceiling with no room to move.

Need Help Choosing a Storage Unit Size?

If you are still asking, “What size storage unit do I need?”, our team can help. At Purely Storage, we have on-site managers ready to help answer all your questions. Tell us what you plan to store, and we can recommend the best unit size for your needs. Visit our size guide to learn more.

Whether you need a small unit for seasonal items or a large storage space for an upcoming move, we have convenient storage options to help you make more room at home, at work, or during life’s next transition.

Contact us today or browse available storage units online to find the right size for your belongings.


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