There’s a particular kind of disappointment that shows up the day a new mattress arrives and turns out to be a few centimetres too wide for the frame waiting for it. Choosing the right size makes a real difference, to how you sleep and to how the room itself feels, and Australia has several standard sizes on offer, from a compact Single right up to a Super King. Each one measures up differently and suits a different kind of sleeper, so it’s worth checking dimensions properly before anything gets ordered.
Understanding mattress sizes Australia offers can save a fair bit of hassle down the track. Comparing the standard dimensions, working out what actually suits your needs, and knowing the common buying mistakes tends to save more grief than people expect. Worth checking your bed frame’s measurements too, especially if you’re replacing an older mattress rather than starting from scratch.
Australian Mattress Sizes and Dimensions Chart
Australian mattresses come in several sizes, though the exact measurements aren’t always identical across brands. Width and length are where the real differences sit. Smaller mattresses tend to suit single sleepers, while Queen and King sizes give couples more room to actually share.
| Mattress Size | Dimensions (Width × Length) | Suitable For |
|---|---|---|
| Single | 92 × 188 cm | Children and single sleepers |
| Long Single | 92 × 203 cm | Taller single sleepers |
| King Single | 107 × 203 cm | Teenagers and adults |
| Double | 138 × 188 cm | Single adults and guest rooms |
| Queen | 153 × 203 cm | Couples and single sleepers |
| King | 183 × 203 cm | Couples wanting extra space |
| Super King | 203 × 203 cm | Large bedrooms |
These measurements are fairly standard across the industry, though some brands publish slightly different figures. Worth checking a manufacturer’s own specifications before buying a mattress, frame, or fitted sheets, rather than assuming every “Queen” is identical.
What Are the Standard Mattress Sizes in Australia?
The most common sizes here are Single, King Single, Double, Queen, and King. Long Single and Super King exist too, though they can be a bit harder to track down.
Each size does a slightly different job. Some add width, others add length for taller sleepers, so it’s worth weighing both measurements rather than choosing based on the name alone.
Single Mattress. Around 92 cm wide and 188 cm long. A practical option for children, guest rooms, and smaller bedrooms. If it’s for an adult, worth checking whether the length actually suits them, taller sleepers often find it a touch short.
Long Single Mattress. 92 × 203 cm, the same width as a regular Single with an extra 15 cm of length. Good for a taller person sleeping alone, and useful when the room itself doesn’t have much width to spare.
King Single Mattress. 107 × 203 cm, more width and length than a standard Single. Worth considering for teenagers and adults after a bit more room without jumping all the way to a Double.
Double Mattress. 138 × 188 cm, wider than a King Single but shorter. Fine for one person who likes extra room, and two adults can share it, though the space tends to feel tight.
Queen Mattress. Around 153 × 203 cm, and the one most couples land on, since it balances sleeping space against bedroom space reasonably well. Replacing a Double with a Queen adds room in both directions at once.
King Mattress. 183 × 203 cm, a full 30 cm wider than a Queen. Suits couples after more personal space, though it does ask for a bigger room and furniture that actually fits around it.
Super King Mattress. Around 203 × 203 cm, genuinely square, and plenty wide for two people. Works best in a spacious bedroom, and worth checking that suitable bedding and frames are actually available before committing.
Australian Mattress Size Comparison
Comparing sizes side by side makes it clearer what’s actually gained moving from one to the next, and a bigger-sounding name doesn’t always mean more length. A Double, for instance, is wider than a King Single but shorter.
Single vs King Single. A King Single adds 15 cm in both width and length, worth considering for a growing teenager or a taller adult.
King Single vs Double. A Double is 31 cm wider, a King Single 15 cm longer. Comes down to whether width or length matters more for the sleeper.
Double vs Queen. A Queen adds roughly 15 cm in both directions, which makes a real difference once two people are sharing.
Queen vs King. Both run 203 cm long, but a King is 30 cm wider, useful for couples after more personal space.
King vs Super King. Another 20 cm of width, though it eats up more floor space and can start limiting where furniture actually fits.
What’s the Most Popular Mattress Size in Australia?
The Queen tends to be the one most Australian households land on. It gives couples enough room without swallowing as much bedroom space as a King, and compatible frames and bedding are easy enough to find.
Shared equally, a Queen gives each person about 76.5 cm of width, more than the 69 cm a Double offers per person. If the bedroom has the space, a Queen is usually worth considering ahead of squeezing two adults onto a Double. That said, a Double can still make sense when floor space is genuinely limited.
What Mattress Size Actually Suits Your Bedroom?
Bedroom size plays a bigger role here than people often give it credit for. A King might offer more room to sleep, but it can also make a smaller bedroom awkward to move around in. Worth measuring the actual floor area and working out where furniture needs to sit before buying anything, and remembering that a bed frame usually runs a bit wider and longer than the mattress itself.
Leave enough space to walk around the bed comfortably too, roughly 60 cm of clearance on accessible sides is a reasonable target. And if there’s a wardrobe with doors that swing outward, worth checking the mattress and frame won’t end up blocking them.
Recommended Bedroom Sizes for Australian Mattresses
These figures are a starting point rather than a hard rule, since the right fit really depends on room layout and furniture.
A room with built-in wardrobes tends to accommodate a larger bed more easily than one with freestanding cupboards eating into the floor space. Door placement, bedside tables, and walking room all factor in too.
For a Single or Long Single, a room around 2.5 × 3 metres is a workable starting point. A King Single or Double tends to suit something closer to 3 × 3 metres, with room left for furniture. A Queen generally wants at least 3.2 × 3.2 metres. A King is better suited to something more spacious, around 4 × 4 metres gives more flexibility. A Super King tends to want 4.2 × 4.2 metres or more.
Worth treating these as planning guides rather than minimums, actual measurements should always have the final say.
Which Size Actually Suits How You Sleep?
The right mattress size comes down to how you sleep and who’s sharing the bed. Someone sleeping alone can often get away with something compact, while couples tend to need the extra width.
Height and sleeping habits matter too. Anyone who shifts around a lot through the night tends to find a wider mattress more comfortable.
Single sleepers usually do fine with a Single or King Single, or a Double if more room is wanted. Couples tend to start with a Queen, moving to a King if personal space matters more. Children and teenagers suit a Single, growing into a King Single as they get taller. Taller adults are generally better off with anything running 203 cm, Long Single, King Single, Queen, or King. Guest bedrooms come down to how often the room actually gets used, a Double tends to offer the most flexibility for occasional guests.
How Mattress Thickness Affects Bed Height
Thickness is worth checking too, since two mattresses can share the same width and length while sitting at completely different heights. It affects how tall the finished bed ends up, what fitted sheets will actually work, and how easy it is to get in and out of bed.
Most Australian mattresses run somewhere between 20 and 35 cm thick, with thinner and thicker options sitting at either end. A 30 cm base paired with a 30 cm mattress puts the sleeping surface roughly 60 cm off the floor, worth keeping in mind before ordering sheets with too shallow a pocket depth.
A thicker mattress isn’t automatically the better one either. Firmness, support, and materials matter just as much as the number on the spec sheet, maybe more.
How to Measure Your Mattress and Bed Frame Properly
Checking measurements before ordering saves a lot of grief later. Worth not assuming a current mattress follows the same dimensions another brand lists, it’s worth measuring the actual mattress and the space inside the frame directly, particularly when replacing something older.
Start with width, side to side, then length, head to foot. Thickness comes next, bottom to top, which matters for choosing sheets and protectors that actually fit. Then measure the bed frame’s internal dimensions, to confirm the replacement will sit properly and get the support it needs. Finally, measure the room itself, doorways, cupboards, and any furniture that might get in the way.
Moving from a Double to a Queen usually means a new frame too, since the two don’t share dimensions.
Australian Mattress Sizes vs UK and US Sizes
Measurements shift between countries even when the names stay the same, which gets confusing fast when ordering imported furniture or bedding. An Australian King isn’t the same width as an American King, so it’s worth comparing actual centimetres rather than trusting the label.
A standard Australian Queen runs about 153 × 203 cm, close enough to the American Queen at 152.4 × 203.2 cm. But an Australian King, at roughly 183 × 203 cm, is noticeably narrower than an American King’s 193 × 203 cm. UK sizing runs differently again, a UK King is typically 150 × 200 cm, smaller than the Australian version. Worth checking the listed measurements directly on anything ordered from overseas, rather than relying on the size name.
Choosing the Right Mattress Size
Working out the right mattress gets easier once sleeping arrangements, bedroom space, and budget are weighed together, and the biggest option on the shelf isn’t automatically the right one.
Start with who’s actually using the bed, a single adult generally needs less width than a couple sharing. Then factor in height and sleeping habits, extra legroom calls for more length rather than simply going wider. Measure the bedroom itself too, checking there’s room for the frame, the furniture, and comfortable movement around it. And budget matters, larger mattresses cost more, and often mean a new frame or bedding to go with them.
Choosing a size that fits current needs while leaving some room for how the bed might get used later tends to be the more sensible approach than chasing the biggest number available.
Common Mattress Size Mistakes Worth Avoiding
A mattress can look perfect in a listing and still cause problems once it’s actually in the room. A few things worth watching for.
Choosing based on the name alone is a common one, since brands don’t always measure “Queen” or “King” identically, worth checking the actual width and length. Ignoring bedroom clearance is another, a large mattress might technically fit while still making it hard to open a drawer or move around comfortably. Mattress thickness is worth checking before buying sheets too, since a shallow pocket depth won’t stretch over a thicker mattress properly.
Delivery access is easy to overlook as well, narrow staircases, doorways, and hallways can turn moving a large mattress into a genuine ordeal. And it’s worth not assuming an imported mattress follows Australian dimensions, even a small difference can cause real headaches with frames and bedding later.
Frequently Asked Questions
What are the standard mattress sizes in Australia? Single, King Single, Double, Queen, King, and Super King are the common ones, with Long Single available for anyone needing extra length.
How big is a Queen mattress in Australia? Roughly 153 cm wide and 203 cm long, though some brands list slightly different figures.
What’s the difference between a Double and a Queen? A Queen runs about 15 cm wider and 15 cm longer, giving couples noticeably more room.
Is a King Single suitable for adults? Yes. At 107 × 203 cm, the extra length makes it workable for plenty of adults sleeping alone.
What size is best for couples? A Queen tends to be the practical starting point, with a King worth considering for more personal space.
Is a Queen bigger than a Double? Yes, a Queen runs about 153 × 203 cm against a Double’s 138 × 188 cm.
Are Australian sizes the same as UK sizes? No, several sizes differ between the two. Worth checking the actual measurements before ordering imported bedding or frames.
Do mattress dimensions vary between Australian brands? Yes, slightly. Worth checking a manufacturer’s own specifications before choosing a mattress or frame.
Getting the Size Right
Choosing the right mattress really comes down to bedroom space, height, and how you actually sleep. A King Single gives one person a bit more room, while Queen and King sizes tend to be the practical picks for couples.
Worth comparing the dimensions properly and measuring the existing bed frame before anything’s ordered. Choosing a size that gives enough room to sleep without crowding the rest of the bedroom tends to make for a decision worth sticking with.
