What Size Should You Buy a Shipping Container In and How to Choose the Right One
Deciding to buy a shipping container is the easy part. Figuring out what size to get is where most people slow down and start second guessing themselves. And honestly that's understandable because it's not as simple as just picking the biggest one available or going with whatever happens to be cheapest at the time.
Get the size right and you have a storage solution that works perfectly for your property and your needs for years to come. Get it wrong and you're either cramming things into a space that's too small and constantly frustrated by it, or paying ongoing costs for a container that's mostly sitting empty.
The good news is that choosing the right size isn't complicated once you understand what's actually available, what each size is realistically suited for, and how to match that against your specific situation. This article walks you through all of it in plain language so you can make a confident decision before you buy a shipping container.
Why Size Is the Most Important Decision You'll Make
When people buy a shipping container the conversation often jumps straight to condition and price. Those things matter but size is the foundation everything else is built on. A container in great condition at a great price is still the wrong purchase if it's the wrong size for what you need.
Here's why getting the size right matters so much:
A container that's too small forces you to store things elsewhere anyway which defeats the purpose of buying one
A container that's too large takes up more of your property than necessary and costs more to buy and potentially more to get council approval for
The wrong size can create access and delivery problems if your site has constraints
Changing your mind after delivery means arranging removal and replacement which costs time and money
Spend the time upfront thinking about size. It saves a much bigger headache later.
The Standard Sizes Available When You Buy a Shipping Container
Shipping containers come in a range of sizes but when you buy a shipping container in Australia you'll most commonly encounter four main options. Understanding what each one actually gives you in terms of usable space is the starting point for making the right call.
10 Foot Containers
A 10 foot container is the smallest standard option and it's more compact than most people picture. The internal dimensions give you roughly 2.8 metres in length, 2.3 metres in width, and around 2.3 metres in height.
This is genuinely useful space for the right situation but it fills up faster than you expect. Think of it as a large garden shed in terms of what it can realistically hold.
A 10 foot container works well for:
Storing garden equipment, tools, and outdoor furniture
Small business document or equipment storage
Tight residential sites where space is genuinely limited
A secondary storage option alongside a larger container
20 Foot Containers
The 20 foot container is the most popular size and there's a very good reason for that. It hits the sweet spot between usable space and practical manageability for most buyers. Internally you're looking at roughly 5.9 metres in length, 2.3 metres in width, and 2.3 metres in height â giving you around 33 cubic metres of storage space.
Most people buying a shipping container for the first time find that a 20 foot container handles their needs comfortably. It's large enough to store the contents of a decent sized room, a vehicle, a significant amount of equipment, or a combination of things without feeling cramped.
A 20 foot container works well for:
Household storage during renovations or moves
Small business stock and equipment storage
Farm and rural property storage
Workshop or hobby space conversions
Retail or market pop up setups
40 Foot Containers
Step up to a 40 foot container and you're dealing with serious space. The internal length runs to around 12 metres giving you roughly 67 cubic metres of storage â double what you get from a 20 foot. This is the right choice when you genuinely need volume and you have the site to accommodate it.
A 40 foot container works well for:
Large volume business or retail stock storage
Agricultural equipment and machinery
Full household contents during extended relocations
Commercial workshop or workspace conversions
Multiple vehicle storage
Before you buy a shipping container at this size make sure your site can actually handle it. Delivery requires significant truck access and the container needs a long flat area to sit correctly. It's a common oversight that creates problems on delivery day.
High Cube Containers
High cube containers are available in both 20 foot and 40 foot lengths but with an extra 30 centimetres of height â bringing the internal ceiling height to around 2.7 metres. That extra headroom makes a surprisingly big difference in certain situations.
High cube containers are worth considering when:
You're converting the container into a liveable or workable space
You're storing tall equipment or items that don't fit comfortably in standard height
You want better ventilation and airflow through the space
You simply want the extra room to move around comfortably inside
The price difference between standard and high cube is usually modest and for many buyers the additional height is worth every dollar.
How to Actually Figure Out What Size You Need
Knowing the sizes is one thing. Matching them to your actual situation is where the real decision gets made. Here's a practical way to think through it.
Think about what you're storing
Make a rough list of everything you plan to put in the container. Be honest about the volume. If you're storing the contents of a three bedroom house during a renovation, a 10 foot container isn't going to cut it. If you're storing a few boxes of documents and some garden tools, a 40 foot container is serious overkill.
Think about how you'll use the space
There's a difference between a container you stack full and never really access versus one you're walking in and out of regularly. If you need to move around inside, find things easily, or work in the space â build in more room than you think you need. A container that feels comfortable to use is far more practical than one you're constantly climbing over things to access.
Think about future needs
It's worth asking yourself whether your storage needs are likely to grow. If there's a reasonable chance you'll be storing more things in twelve months than you are today, sizing up now is smarter and cheaper than buying a second container later.
Think about your site
This is the practical constraint that overrides everything else in some situations. Measure your available space carefully including the access route for delivery. A 40 foot container needs a lot of clearance to be delivered safely. If your site is tight, a 20 foot might be the right answer regardless of how much space you'd ideally like.
A Few Things Worth Knowing Before You Commit
Before you finalize your decision to buy a shipping container in a specific size there are a few practical things worth confirming:
Check with your local council whether a permit is required for the size you're considering â regulations vary between areas and some councils have restrictions on container dimensions
Confirm the delivery cost for the size you've chosen â larger containers cost more to transport and the delivery fee can be significant
Make sure the ground where the container will sit is level and firm enough to support the weight
Consider whether you need modifications like shelving, lighting, ventilation, or additional doors â some of these are easier to add during the buying process than after
The Bottom Line
Choosing the right size when you buy a shipping container comes down to honest thinking about what you need, how you'll use the space, what your site can handle, and where your needs might go in the future.
For most buyers a 20 foot container is the right starting point â it handles a wide range of uses comfortably and works on most standard residential and commercial sites. If your needs are genuinely larger, step up to a 40 foot. If space is tight and your storage needs are modest, a 10 foot does the job without taking over your property.
Take the time to get this decision right before anything else. It's the foundation of a purchase that should serve you well for many years â and it starts with choosing a size that actually fits your life.















