Mattress dimensions are not as standardised as they look on paper. A queen here is not quite the same as a queen there. A king from one retailer may differ in length from a king at another. If you have ever ordered a fitted sheet that did not quite fit, or a bed frame that left a gap at the foot, you already know this from experience.
This guide lays out the standard mattress dimensions used in Singapore and explains how they compare to other international standards.
Standard Mattress Sizes in Singapore
These are the most common dimensions used by retailers in Singapore:
Single: 91 cm x 190 cm
Super Single: 107 cm x 190 cm or 107 cm x 200 cm
Queen: 152 cm x 190 cm or 152 cm x 200 cm
King: 183 cm x 190 cm or 183 cm x 200 cm
Actual dimensions can vary slightly between brands. Always check the specific centimetre measurements on a product listing rather than relying on the size name alone.
Single Mattress
A single mattress at 91 cm x 190 cm suits one adult sleeper who does not move around much, or a growing child. It is the most common size for children's rooms, dormitories, and compact guest rooms.
For taller adults or those who want a bit more room, some retailers offer a longer single at 91 cm x 200 cm. Check available lengths before ordering.
Super Single Mattress
The super single at 107 cm x 190 cm or 200 cm is a size that is fairly common in Singapore but less standardised in other countries. It gives one person noticeably more room than a standard single and suits adults who want the comfort of more space without the footprint of a queen.
It also works for older children or teenagers who have grown out of a standard single but share a room where a queen would not fit.
Queen Mattress
A queen is the most commonly purchased size for adult couples and single sleepers who want more room. At 152 cm x 190 or 200 cm, it fits most Singapore bedrooms without making the room feel crowded.
It is also the most widely available size for bedding, which makes finding fitted sheets and duvet covers straightforward.
King Mattress
A king at 183 cm x 190 or 200 cm is the widest standard size available from most Singapore retailers. It suits couples who want generous personal space across the mattress without movement from one side disturbing the other.
A king requires a bedroom with enough clearance around the bed to remain practical. In most HDB master bedrooms, a king fits but leaves limited floor space. In larger rooms, it works very comfortably.
The Somnuz mattress collection covers all of these sizes across different mattress types. If you are comparing sizes side by side, browsing by size on the collection page shows what is available in each dimension.
International Mattress Dimensions for Comparison
US Twin: 97 cm x 190 cm
US Full (Double): 137 cm x 190 cm
US Queen: 153 cm x 203 cm
US King: 193 cm x 203 cm
US California King: 183 cm x 213 cm
Australian Queen: 153 cm x 203 cm
Australian King: 183 cm x 203 cm
UK Single: 90 cm x 190 cm
UK Double: 135 cm x 190 cm
UK King: 150 cm x 200 cm
UK Super King: 180 cm x 200 cm
As you can see, the same size name covers meaningfully different dimensions depending on the country. A UK king is not the same as a US king or an Australian king.
Why Dimensions Matter When Buying Bedding
Fitted sheets are sized based on mattress width, length, and depth. If your mattress does not match the region of the bedding you are buying, it will either not fit or not stay in place.
For most Singapore shoppers buying local bedding, the locally available queen and king sizes will be sized for local mattress dimensions. The problem arises when buying from overseas retailers who size their bedding for US, Australian, or UK standards.
When in doubt, check the listed centimetre dimensions on the bedding rather than relying on the size label.
How to Measure Your Existing Mattress
If you are replacing a mattress and want to match the size exactly, measure the existing mattress at its widest point, its longest point, and its height. Do this with a tape measure while the mattress is flat on the floor or bed base.
Measure the depth of your fitted sheet pocket as well. Thicker mattresses need deeper-pocketed sheets. A standard fitted sheet may not pull down far enough on a 30 cm deep mattress.
Choosing the Right Size for Your Room
A useful rule of thumb is to leave at least 60 cm of clearance on each walkable side of the bed. This keeps the room usable rather than feeling crowded.
For the foot of the bed, 90 cm of clearance is comfortable. Less than that and navigating the room feels cramped, which affects how the room feels to use day to day.
If you are setting up a room and want to compare which mattress type suits your chosen size, the Premium Series and Luxury Series at Somnuz cover multiple sizes across different comfort and build levels.
Final Thoughts
Mattress dimensions vary between markets and sometimes between retailers within the same market. Always verify exact centimetre measurements before buying a mattress, frame, or bedding. Size labels are a starting point, not a guarantee.
For a full range of standard Singapore sizes in different mattress constructions, the Somnuz mattress collection is a practical place to compare options.