A Double mattress can be a good middle ground if you want more room than a Single or King Single but don't quite have the space for a Queen. They're commonly used by solo sleepers who like extra room, couples with smaller bedrooms, teenagers and guest rooms.
But size matters, especially if two people will be sharing the bed every night. A Double gives you less personal sleeping space than a Queen, and its shorter length may not suit every sleeper either.
Before you choose one, it helps to know exactly how big a Double mattress is, who it tends to suit and how it compares with the next size up.
What Size Is a Double Mattress in Australia?
A standard Australian Double mattress is approximately 138 cm wide and 188 cm long. To put that into perspective, you can refer to the table below to see how a Double mattress compares to a King Single and a Queen.
| Mattress | Width | Length | Best For |
| King Single | 107 cm | 03 cm | Solo sleepers who want extra length |
| Double | 138 cm | 188 cm | Solo sleepers or two people with limited space |
| Queen | 53 cm | 203 cm | Couples wanting more personal space |
As you can see, a Double gives you considerably more width than a King Single, but it is also shorter. Compared with a Queen, you're giving up around 15 cm in both width and length.
That may not sound like a huge difference on paper, but it can be noticeable when two people share a mattress.
Who Is a Double Mattress Best For?
A Double can suit a variety of bedrooms and sleeping arrangements. The main question is whether the available width and length suit the people who will actually be sleeping on it.
- Solo adults: A Double gives one person plenty of room to change sleeping positions without going straight to a Queen.
- Couples with a smaller bedroom: A Double can work when floor space is limited, particularly for couples who don't mind sleeping fairly close together.
- Teenagers and young adults: A Double is a practical option for teens and young adults who have outgrown a Single but don’t need a Queen.
- Guest rooms: A Double gives you the flexibility to accommodate either one guest or a couple without requiring the footprint of a Queen.
Is a Double Mattress Big Enough for Two People?
Yes, two adults can sleep on a Double mattress, but whether it feels comfortable depends on how you both sleep.
At around 138 cm wide, a Double mattress gives each person roughly 69 cm of sleeping width when shared evenly. A Queen, by comparison, gives each person around 76.5 cm.
A Double may be enough if you both tend to stay on your own side of the bed and don't mind sleeping close together. You may find it more restrictive if:
- One or both of you move around a lot during the night
- You're both broad sleepers
- One person tends to stretch out or take up more room
- A pet regularly sleeps on the bed
- Children sometimes climb into bed with you
- You're easily disturbed by your partner moving
If two adults will use the mattress every night and your bedroom has the space, it can be worth comparing a Double with a Queen before deciding.
Double vs Queen Mattress: Which Should You Choose?
The main difference between a Double and Queen mattress is the extra room. A Queen is approximately 153 cm wide and 203 cm long, compared with 138 cm by 188 cm for a Double. That gives you an extra 15 cm of width and 15 cm of length.
You can refer to the table below to determine if a Double or Queen is most suitable for your situation.
| Choose a Double Mattress if: | Choose a Queen Mattress if: |
| You usually sleep alone | Two adults will use the bed every night |
| Bedroom space is limited | Either of you is taller |
| ou're furnishing a guest room | You both like more personal space |
| You're trying to leave more room for bedside tables or other furniture |
One of you moves around frequently during sleep |
| You and your partner are comfortable sharing a smaller sleep surface |
Your bedroom comfortably accommodates the larger frame |
It isn't always the case that bigger is better. A Queen that leaves you squeezing past furniture every day may be less practical than a Double that actually suits the room.
What About a Double Mattress for Taller Sleepers?
The width of a Double often gets most of the attention, but its length is worth checking too.
At around 188 cm long, a Double is actually shorter than a King Single or Queen mattress, which are generally around 203 cm long.
That means a tall solo sleeper shouldn't automatically assume a Double is the better option simply because it's wider.
If you mostly want more width, a Double can make sense. If you're taller and mainly need more legroom, a King Single may be worth considering instead.
Couples with a taller sleeper may find a Queen more practical because it gives you both additional width and length.
Will a Double Mattress Fit in Your Bedroom? A Quick Measuring Guide
The mattress may technically fit into the room, but that doesn't necessarily mean the overall setup will feel comfortable. Take a few measurements and think about how you'll move around the bedroom once the bed is in place.
Measure the Mattress and Bed Frame Separately
A Double mattress measures around 138 cm by 188 cm, but your complete bed may take up more room. Bedheads, side rails and foot ends can all increase the overall dimensions of a Double bed frame.
Check the measurements listed for the specific bed frame you're considering rather than using the mattress measurements alone.
Check the Space Around the Bed
Think beyond whether the bed physically fits between four walls. Check that you'll still have enough room to:
- Comfortably walk along the sides of the bed
- Open wardrobe and cupboard doors
- Use bedside drawers
- Open the bedroom door fully
- Move between the bed and other furniture
- Get around the foot of the bed without squeezing through
If a Queen leaves very little room to move but a Double gives the bedroom a much more comfortable layout, that can make the Double the better everyday choice.
What Should You Look for in a Double Mattress?
Size is only one part of the decision. Comfort, support and how the mattress behaves when shared can make just as much difference.
Firmness and Support
Mattress firmness is largely a matter of personal preference, but you still need enough support to keep your body comfortable throughout the night. Some sleepers prefer a softer surface they can sink into, while others feel more comfortable on something firmer.
If you're sharing the mattress, try to find a comfort level that works for both sleepers rather than choosing based on one person's preference alone.
Partner Disturbance
If you share a Double mattress, movement can be more noticeable because you're sleeping closer together. Mattresses with individually responsive springs or materials designed to absorb movement may help reduce how much motion travels across the mattress.
If one of you is a particularly light sleeper, this is worth considering when comparing different options.
Edge Support
Edge support can be especially useful on a Double mattress because two sleepers are using a relatively compact surface.
A supportive edge lets you use more of the mattress without feeling unstable when you sleep or sit close to the side.
This can make the available sleeping space feel more usable, particularly when the mattress is being shared.
Temperature
Two people sharing a smaller mattress can also generate more warmth during the night. If either of you tends to sleep hot, look at how the mattress handles airflow and heat. You may also benefit from a mattress with cooling features.
Different foams, fabrics and mattress constructions can feel quite different, so this is something worth testing alongside firmness and support.
Find the Right Double Mattress at Bevmarks
Choosing the right Double mattress comes down to choosing a comfort level and support system that suits your sleep style and budget. With a wide range of trusted brands and mattress types available, Bevmarks makes it easier to narrow down your options and sleep with confidence.
Browse our Double mattress collection online or visit your nearest Bevmarks store to experience the comfort for yourself and find your perfect match today. Feel free to reach out to our team as well for expert advice and recommendations.