When shopping for a new mattress in Australia, one of the most important decisions you'll make isn't just about comfort or brand—it's about size.
And here's something many Australians don't realize: mattress sizes in Australia are different from those in the United States, United Kingdom, and other countries.
Choosing the right Australian standard mattress size isn't just about fitting your bedroom—it's crucial for ensuring your bed sheets, mattress protectors, and electric blankets actually fit properly.
In this comprehensive guide, we'll walk you through everything you need to know about Australian mattress sizes, why they matter, and how to choose the perfect size for your needs.
Understanding Australian Standard Mattress Sizes
Australia has its own set of standard mattress dimensions that differ from international sizes.
The Australian/New Zealand Standard (AS/NZS 4220) defines these measurements, and they're what you'll find in virtually every Australian bedding store, both online and offline.
Here are the standard Australian mattress sizes:
Single Mattress
- Dimensions: 92cm x 188cm (36" x 74")
- Best for: Children, teenagers, guest rooms, or small bedrooms
- Room size needed: Minimum 3m x 3m
King Single Mattress
- Dimensions: 107cm x 203cm (42" x 80")
- Best for: Taller teenagers, single adults who want extra room, or narrow bedrooms
- Room size needed: Minimum 3m x 3.5m
Double Mattress
- Dimensions: 138cm x 188cm (54" x 74")
- Best for: Single sleepers who want space, or couples in smaller bedrooms
- Room size needed: Minimum 3m x 3.5m
Queen Mattress
- Dimensions: 153cm x 203cm (60" x 80")
- Best for: Couples, master bedrooms, most popular size in Australia
- Room size needed: Minimum 3m x 4m
King Mattress
- Dimensions: 183cm x 203cm (72" x 80")
- Best for: Couples who want maximum space, families with young children, spacious master bedrooms
- Room size needed: Minimum 4m x 4m
Super King Mattress (California King)
- Dimensions: 203cm x 203cm (80" x 80")
- Best for: Very large bedrooms, couples who want ultimate space
- Room size needed: Minimum 4.5m x 4.5m
Why Australian Mattress Sizes Matter
You might be wondering: does it really matter if my mattress is a few centimeters different from the standard? The answer is absolutely yes, and here's why.
1. Bed Sheets Won't Fit Properly
This is the most common problem Australians face when buying non-standard mattresses. Australian bed sheets are manufactured specifically to fit Australian standard mattress sizes. If you purchase an imported mattress with US or UK dimensions, you'll struggle to find sheets that fit properly.
A US Queen mattress, for example, measures 152cm x 203cm—just 1cm narrower than an Australian Queen (153cm x 203cm). While this seems minor, bed sheets are designed with specific pocket depths and elastic tension. That 1cm difference means:
- Fitted sheets may be too loose and bunch up
- Or they might be too tight and pop off the corners during the night
- Flat sheets won't drape correctly
When you choose an Australian standard mattress size, you have access to thousands of bed sheet options from brands like Sheridan, Adairs, Kmart, Target, Jumbled Online or Aura and countless online retailers.
Every sheet set you see will fit your mattress perfectly.
2. Mattress Protectors Are Size-Specific
Mattress protectors are essential for extending the life of your mattress, protecting against spills, dust mites, and allergens. Like sheets, these are manufactured to Australian standard sizes.
A properly fitted mattress protector should:
- Cover the entire top surface of your mattress
- Wrap around all sides with a snug fit
- Stay securely in place without shifting
If your mattress doesn't match Australian standards, finding a protector that fits correctly becomes nearly impossible.
You'll either have excess fabric bunching underneath you (uncomfortable) or gaps where your mattress isn't protected (defeating the purpose).
Quality mattress protectors from Australian brands like Protect-A-Bed, Bambi, and DuuDuu are all designed for Australian standard sizes. When you stick with these dimensions, you're guaranteed a perfect fit.
3. Electric Blankets Are Designed for Australian Sizes
If you live in Melbourne, Brisbane, Adelaide, or anywhere else in Australia where winters get cold, an electric blanket is a bedroom essential.
These heated blankets are a popular way to stay warm without cranking up the heating bill.
Here's the issue: electric blankets are precisely sized to match Australian mattress dimensions.
The heating elements inside are strategically placed to provide even warmth across the entire sleeping surface. If your mattress doesn't match Australian standards:
- The blanket may be too small, leaving cold spots
- It might be too large, with excess fabric that bunches up
- The heating elements won't align properly with where you sleep according to your body size
- Safety ties and elastic straps won't secure it properly
Major Australian electric blanket brands like Sunbeam, Dimplex, and Goldair all manufacture to Australian mattress standards.
When your mattress matches these dimensions, you're guaranteed comfortable, safe, and even heating throughout the night.
4. Bed Frames Are Built for Australian Sizes
Australian bed frames, whether you're buying from IKEA, Fantastic Furniture, Snooze, or a custom furniture maker, are designed around Australian standard mattress sizes.
The internal dimensions of the frame are calculated to provide proper support for these specific measurements.
Using a non-standard mattress size can result in:
- Gaps between the mattress and frame edges (looks poor and mattress can shift)
- Overhang where the mattress extends beyond the frame (unsupported edges wear out faster)
- Improper weight distribution affecting mattress longevity
- Difficulty with bed assembly if dimensions don't match
When you choose an Australian standard size mattress, any bed frame marketed for that size will fit perfectly—guaranteed.
5. Bedroom Planning and Furniture Placement
Interior designers and furniture retailers in Australia plan bedroom layouts based on standard Australian mattress sizes.
When you're shopping for bedroom furniture or planning your space, everything from bedside tables to walking space is calculated around these dimensions.
This standardization means:
- You can visualize room layouts using standard measurements
- Online room planners and apps use Australian dimensions
- Furniture retailers can give accurate spacing recommendations
- You can easily upgrade or replace your mattress without rethinking your entire bedroom layout
How Australian Sizes Compare to International Standards
Understanding how Australian sizes differ from other countries helps explain why it's so important to stick with local standards.
Australian Queen vs. US Queen
- Australian Queen: 153cm x 203cm
- US Queen: 152cm x 203cm
- Difference: 1cm wider (Australian size)
While only 1cm different in width, this is enough to affect the fit of bedding accessories.
Australian King vs. US King
- Australian King: 183cm x 203cm
- US King: 193cm x 203cm
- Difference: 10cm narrower (Australian size)
This is a significant difference. US King bedding will be far too large for an Australian King mattress.
Australian Double vs. UK Double
- Australian Double: 138cm x 188cm
- UK Double: 135cm x 190cm
- Difference: 3cm wider, 2cm shorter (Australian)
Again, these small differences make standard bedding incompatible.
Choosing the Right Mattress Size for Your Needs
Now that you understand why Australian standard sizes matter, let's help you choose the right size for your situation.
For Single Sleepers
Single (92cm x 188cm): Perfect for children and young teenagers, or adults in very small spaces like studio apartments. However, most adults find this too narrow for comfortable long-term sleeping.
King Single (107cm x 203cm): A better option for taller teenagers and adults. The extra 15cm width and 15cm length make a significant difference in comfort. This is also an excellent choice for guest rooms, giving visitors more space than a standard single.
Double (138cm x 188cm): If you have the space, a double gives a single sleeper plenty of room to spread out. Great for people who move around a lot at night or just enjoy extra space.
For Couples
Double (138cm x 188cm): This is the absolute minimum for couples, giving each person just 69cm of width—quite cramped for most adults. While it fits in smaller bedrooms, most couples find it too restrictive.
Queen (153cm x 203cm): The most popular mattress size in Australia for good reason. It offers each person approximately 76cm of width, which is comfortable for most couples. The 203cm length accommodates taller individuals. Queen is the sweet spot of comfort and practicality for Australian bedrooms.
King (183cm x 203cm): Offers each person about 91cm of width—nearly as much as sleeping alone on a single mattress. Perfect if either partner is a restless sleeper, if you have children who visit your bed, or if you simply want maximum comfort. Requires a larger bedroom but worth it if space allows.
Super King (203cm x 203cm): The ultimate in space and luxury. Each person gets over 100cm of width. This size is less common but growing in popularity for master suites in newer, larger homes.
Special Considerations When Buying A Mattress
Height: If you're over 185cm tall, consider King Single (for singles) or Queen/King (for couples) to ensure the 203cm length gives you adequate room without your feet hanging off the edge.
Room Size: Make sure you can fit your bed with at least 60-80cm of walking space on all sides (except against walls). Measure your room carefully before deciding on a size.
Pets: If you share your bed with furry friends, consider sizing up to give everyone comfortable space.
Future Needs: If you're single now but might share your bed in the future, or if you have young children who might join you in the mornings, consider buying larger than your immediate needs.
The Duuduu Advantage: Australian Standard Sizes
At DuuDuu, all our mattresses are manufactured to exact Australian standard dimensions. This means:
- Perfect compatibility with all Australian bedding accessories
- Wide selection of sheets, protectors, and blankets available everywhere
- Standard bed frame fit from any Australian furniture retailer
- Easy replacement when it's time to upgrade in the future
- Proper room planning using standard Australian measurements
When you invest in a DuuDuu mattress, you're not just getting premium comfort and cooling technology—you're also getting a mattress that works seamlessly with the Australian bedding ecosystem.
Common Mistakes to Avoid
Buying European Mattresses Without Checking Dimensions
Online shopping makes it easy to purchase mattresses from overseas retailers, but unless the dimensions specifically match Australian standards, you'll face ongoing frustration finding properly fitting bedding.
Assuming "Queen" Means the Same Thing Everywhere
As we've discussed, a Queen mattress in the US, UK, and Australia all have different dimensions. Always check the exact measurements in centimeters, not just the size name.
Forgetting to Measure Your Room
A King mattress might sound perfect, but if your bedroom is only 3m x 3.5m, it will dominate the space and make the room feel cramped and difficult to navigate.
Not Considering Mattress Height
Modern mattresses, especially those with pillow tops or multiple comfort layers, can be quite tall (30-40cm). This affects the overall bed height when combined with your base or frame. Make sure your fitted sheets have deep enough pockets.
Making Your Decision
Choosing the right mattress size is one of the most important decisions in creating a comfortable bedroom.
By sticking with Australian standard sizes, you're making life easier for yourself now and in the future.
Consider your immediate needs, your space, your budget, and any potential future changes.
When in doubt, sizing up usually provides better long-term satisfaction—most people who go larger never wish they'd gone smaller, but many who go too small end up wishing they'd chosen a bigger size.
At DuuDuu, we offer all standard Australian mattress sizes with the same premium comfort, cooling technology, and quality construction across the range. Whether you need a Single for your child's room or a King for your master suite, you'll get the same exceptional sleep experience—in exactly the right size for your Australian home.
Ready to Upgrade?
Now that you understand Australian mattress sizes and why they matter, you're ready to make an informed decision. Remember: choosing the right size is just as important as choosing the right comfort level.
Browse our full range of Australian standard size mattresses, all featuring our signature cooling fabric technology that regulates your body temperature for the perfect night's sleep. With delivery within 3 working days and a 100-night trial, there's never been a better time to upgrade to the Duuduu comfort you deserve.
Shop Duuduu Mattresses today and experience the difference that proper sizing, premium materials, and thoughtful Australian design can make to your sleep quality.
