Double Size Mattress Australia: Is It Big Enough
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If you’ve ever stood in a showroom thinking,
“Double sounds roomy… but is it actually?”
You’re not alone.
The double mattress is one of the most commonly searched bed sizes in Australia — and also one of the most misunderstood. Some people buy it thinking it’s the standard size for couples. Others assume it’s just a slightly bigger single.
The truth? It sits somewhere in between.
Let’s break down exactly how big a double mattress is in Australia, who it really suits, and when you might want to size up.
If you want the full comparison of all Australian sizes, you can also check our complete 👉 Bed Mattress Size Guide Australia 👈.
So, What Size Is a Double Mattress in Australia?
A standard double mattress measures:
138 cm wide × 188 cm long
That’s it. No hidden variations. No surprises.
To give you context:
- It’s 46 cm wider than a single
- It’s 31 cm wider than a king single
- It’s 15 cm narrower than a queen
- It’s the same length as a single (188 cm)
That last point catches a lot of people out.
If you’re tall, length matters just as much as width.
Is a Double Mattress Big Enough for Couples?
Short answer?
Yes… but it depends how much you like each other.
A double gives each sleeper about 69 cm of personal space. For reference:
- A queen gives 76.5 cm each
- A king gives 91.5 cm each
So a double works best if:
- You’re both smaller in build
- You don’t move around much
- It’s short-term use (guest room, temporary setup)
- The bedroom is tight on space
If you’re a light sleeper and your partner tosses and turns, a double can feel snug very quickly.
In Australia, most long-term couples eventually upgrade to a queen.
Is a Double Mattress Good for One Person?
Absolutely.
In fact, this is where a double really shines.
For solo sleepers, a double feels luxurious without overwhelming the room. You can:
- Stretch out
- Roll around
- Sleep diagonally (no judgement)
- Share the bed with a dog
If you want more space than a king single but don’t need queen-level width, a double hits a sweet spot.
Double vs King Single: What’s the Real Difference?
This is one of the most searched mattress comparisons in Australia.
| Size | Dimensions | Best For |
|---|---|---|
| King Single | 107 × 203 cm | Tall solo sleepers |
| Double | 138 × 188 cm | Solo adults wanting width |
The key difference?
- King single = longer
- Double = wider
If you’re tall (over 180 cm), the king single’s 203 cm length may feel more comfortable.
If you’re average height and want more shoulder space, the double wins.
Double vs Queen: Should You Just Go Bigger?
Here’s where people hesitate.
A queen mattress measures 153 × 203 cm.
Compared to a double, it’s:
- 15 cm wider
- 15 cm longer
It doesn’t sound like much — but in a bedroom, it’s noticeable.
Choose a double if:
- Your room is under 3 metres wide
- You’re sleeping solo
- Budget matters
- You want more floor space
Choose a queen if:
- Two adults are sleeping long-term
- One or both sleepers are tall
- You want more personal space
In most Australian homes, queen is the “default couple size.” But that doesn’t mean double is wrong — it just means it’s more situational.
What Room Size Do You Need for a Double Bed?
This is where many people go wrong. They measure the mattress but forget about walking space.
Minimum room size:
2.7 m × 3 m
This allows basic circulation and one accessible side.
Ideal room size:
3 m × 3 m or larger
This gives you:
- Two bedside tables
- Comfortable walking clearance
- Space for wardrobes or drawers
If your bedroom is on the smaller side, a double can feel much more practical than squeezing in a queen.
Is a Double Mattress Too Short?
At 188 cm long, a double is the same length as a single.
If you’re under 180 cm tall, you’ll likely be fine.
If you’re taller than 185 cm, your feet may sit close to the edge — especially if you sleep stretched out.
This is where many tall Australians choose:
- King single (longer)
- Queen (longer and wider)
Length is often overlooked — but it makes a real difference in comfort.
When Does a Double Make the Most Sense?
A double mattress is a smart choice if:
- You’re upgrading from a single
- You live in an apartment
- It’s a guest bedroom
- You want flexibility
- You don’t want the room dominated by the bed
It’s also popular in older Australian homes where bedroom dimensions are slightly narrower.
What About Mattress Thickness?
Double mattresses usually range between:
- 20 cm (standard profile)
- 25–35 cm (premium profile)
Thicker mattresses tend to offer:
- Better pressure relief
- Improved durability
- More edge stability
Just make sure your fitted sheets and bed frame match the mattress height.
Bedding Tips for Double Mattresses
Stick to:
- Double fitted sheets
- Double mattress protectors
Some people size up their doona to queen for extra overhang — especially if sharing the bed.
Common Double Mattress Myths
“Double is the standard couple size.”
Not really. Queen is more common for long-term couples.
“It’s just a bigger single.”
It’s significantly wider — but not longer.
“It’ll save money long-term.”
Maybe — unless you upgrade later because it feels cramped.
Looking for a Double Mattress?
If you’ve decided a double mattress is the right fit for your space, the next step is choosing the right comfort level and support system.
At Onebed, our double mattress range is designed for Australian sleepers who want space without upsizing to a queen.
You can explore the full collection here:
👉 Double Mattress 👈
Here’s a quick breakdown of the available models in double size:
Onebed Essential – Practical Comfort Without the Fuss
The Onebed Essential is a great entry-level option for:
- Solo sleepers upgrading from a single
- Guest bedrooms
- Budget-conscious buyers
It delivers balanced medium support and dependable comfort without overcomplicating things. Ideal if you want a straightforward, comfortable double mattress at a practical price point.
Onebed Original – Hybrid Support with Extra Stability
The Onebed Original combines:
- Pocket spring support
- Adaptive comfort foam
- Zoned ergonomic design
For double mattress users, this model is especially useful if:
- You share the bed occasionally
- You want better edge support
- You prefer a slightly more responsive feel
The hybrid construction improves airflow — helpful in warmer Australian climates.
Onebed Max – Premium Comfort for Long-Term Use
The Onebed Max is the most advanced option in the range.
It’s designed for:
- Long-term double mattress users
- Couples in compact bedrooms
- Sleepers wanting enhanced pressure relief
With a higher profile and upgraded comfort layers, it provides a more luxurious sleep experience while maintaining strong support.
Which Double Mattress Should You Choose?
- Want simplicity and value → Essential
- Want balanced support and versatility → Original
- Want premium comfort and durability → Max
All three models are available in double size (138 × 188 cm) and built to meet Australian standards.
If you’re still deciding whether double is right for your room, revisit the size guide above to confirm your space requirements before purchasing.
So… Is a Double Mattress Right for You?
It depends on how you sleep, how tall you are, and how much space you have.
A double is:
- Spacious for one
- Compact for two
- Practical for smaller rooms
- A great middle-ground size
It’s not oversized. It’s not tiny. It’s simply situational.
If you’re deciding between sizes, compare it alongside other Australian options in our full Bed Mattress Size Guide Australia to see how it stacks up.
