How to Choose the Right Self Storage Unit Size: A Practical Guide
Choosing the right self storage unit size can save you time, money and space. Whether you’re storing seasonal clothes, moving house or need business storage, this guide will help you match the right unit to your needs.
We’ll walk you through what size self storage unit you need, with examples and expert tips to make your decision simple.
Why Storage Unit Size Matters
Picking the right self storage unit size is one of the most important decisions you’ll make when storing your belongings.
Here’s why selecting the correct self storage unit size matters:
Avoid Overpaying for Space You Don’t Use
Renting a unit that’s too large means you’re paying for empty space. By choosing a storage unit that closely matches your actual storage needs, you save money and maximise value.
Ensure Your Belongings Fit Comfortably and Safely
Overpacking a small unit can lead to damage and frustration. With the right size, you can store furniture, boxes and fragile items without stacking unsafely or cramming everything in.
Make Your Storage Items Easier To Access
If you’ll need to access your stored items regularly, having enough space to create walkways or sort through boxes is crucial. A well-sized unit makes it easier to organise, retrieve and rotate your belongings without hassle.
Choosing the right storage unit size improves your overall experience — whether you're moving home, decluttering or managing stock for your business.
What Size Are Self Storage Units?
Self storage units are measured in square feet, usually by width and depth with a fixed height (commonly 8 ft). Sizes range from compact units (like a double wardrobe) to spaces as large as a shipping container or a double garage.
Keep in mind that it’s not just about floor space — the volume (height included) also impacts how much you can store.
Factors That Affect What Size Self Storage Unit You Need
Type and Quantity of Items You Plan to Store
Furniture, boxes, business inventory, or appliances all take up varying amounts of space. Bulky or awkwardly shaped items might need more room or specific stacking.
Duration and Access Needs
Long-term storage? Maximise your use of available space. Short-term or frequent access? Leave room for walkways so you can reach things easily when needed.
Storage Unit Size Examples: What Fits in Each
At STOREX Self Storage, we offer a wide range of unit sizes designed to match your specific storage needs. From compact spaces for a few boxes to extra-large units for full house moves or business stock, here’s a breakdown of what typically fits in each of our storage unit sizes.
Small Units: Equivalent to a Double Wardrobe or Garden Shed (16–30 Sq Ft)
16 Sq Ft: Roughly the size of a double wardrobe. Ideal for storing 15–20 medium-sized boxes, perfect for seasonal clothing, archive files or small personal items.
30 Sq Ft: About the size of a small garden shed. Great for 30–35 boxes or small household items like sports gear and tools.
Medium Units: Like Half a Garage or a Delivery Van (50–80 Sq Ft)
50 Sq Ft: Fits the contents of a one-bedroom flat. Can hold around 60–70 boxes, small appliances and furniture like a single bed or wardrobe.
60–65 Sq Ft: Comparable to a box van or supermarket delivery van. Ideal for storing 70–80 boxes, chairs, small tables or a bike.
80 Sq Ft: Suits the contents of a small house or two-bedroom apartment. Store between 80–90 boxes or medium-sized furniture.
Large Units: From a Single Garage to Half a Shipping Container (100–160 Sq Ft)
100 Sq Ft: Similar in size to a single garage or Luton van. Can comfortably store 100–110 boxes, or beds, appliances or a lounge set.
130 Sq Ft: Great for a three-bedroom house. Holds 125–130 boxes or full sets of home furnishings.
160 Sq Ft: Equal to half a shipping container. Fits 150–160 boxes, large furniture, or bulkier business inventory.
Extra Large Units – Spacious and Versatile (200+ Sq Ft)
200–250 Sq Ft: Suitable for storing the contents of a four to five-bedroom house. Expect room for up to 240 boxes, white goods, and large items.
300 Sq Ft: Ideal for a four-bedroom home with a garage. Offers space for approximately 280–310 boxes, plus bulk storage or equipment.
400 Sq Ft: As big as a large conference room. Designed for major renovations, office moves or extensive inventory, with capacity for up to 420 boxes.
These size examples are based on STOREX’s standard self storage units and are available across our locations in Watford, Sunbury, Cricklewood, Brentford and Loughton.
Need help deciding which size is right for you? Contact our team on 01923 969310 for expert advice.
How to Choose the Right Self Storage Unit Size
Create an Inventory List
Start by listing every item you plan to store. Be honest and thorough — this will help you avoid underestimating your space needs.
Compare Against Unit Size Guides
Use STOREX’s handy unit size descriptions to visualise your items. You’ll soon spot whether you need to size up or down.
Speak to a Storage Expert
Still unsure? Reach out to our friendly team. We’ll help you pick the right unit for your belongings and budget.
Common Mistakes When Choosing a Unit Size
- Underestimating how much space furniture and large items take
- Forgetting to leave access aisles for regular use
- Picking a unit based purely on price, rather than practicality
Why Store With STOREX?
At STOREX, we offer more than just space:
- Modern, secure units with smart tech access (no padlocks or PINs)
- Transparent pricing and flexible rental terms
- Convenient online booking and account management
- A wide range of personal storage units to suit every need
Explore Personal Storage Units now!
Need More Than Storage? Explore STOREX Fab Labs
Need creative space or room to grow your side hustle? Our Fab Labs are perfect for entrepreneurs and makers who need a storage solution with purpose.
Find the Right Storage Unit Size With STOREX
Whether you're moving, decluttering or running a business, finding the right self storage unit size is key. STOREX makes it easy with modern spaces, expert help and smart tech.
Visit your nearest STOREX location to find your fit today.