If you have ever tried to buy a mattress and ended up confused by a mix of feet, inches, and centimetres across different listings, you are not alone. Metric measurements are the most precise and consistent way to compare mattress sizes, and in Singapore, centimetres are the standard unit used by most reputable retailers and bed frame manufacturers.
This guide gives you every standard mattress size in metric, explains what each one is genuinely suited for, and helps you figure out which size works best for your room and the way you sleep.
Why Metric Measurements Matter When Shopping for a Mattress
Metric sizing removes the guesswork. When your room measurements and your mattress dimensions are both in centimetres, you can compare them directly without the risk of conversion errors creeping in.
This matters more than people expect. A few centimetres in the wrong direction can mean a mattress that overhangs a bed frame, a room layout that feels cramped, or a sleeping surface that does not give you the space you actually need. Working in metric from the start makes the whole process more straightforward.
In Singapore, where HDB bedrooms and condo rooms are often designed to fairly specific proportions, accurate metric measurements are genuinely useful before you commit to a purchase.
Standard Mattress Sizes in Metric
Here is a clear reference for every size you are likely to encounter when shopping in Singapore, all in centimetres.
Single: 91 cm x 190 cm The single mattress is the most compact standard option. It suits children's bedrooms, guest rooms, and smaller secondary bedrooms well. At 91 cm wide, it gives a solo sleeper adequate space without taking up much of the room's floor area. It also fits most standard HDB single bedrooms comfortably.
Super Single: 107 cm x 190 cm The super single is a particularly popular size in Singapore and for good reason. At 107 cm wide, it gives a solo sleeper considerably more room than a standard single while still fitting neatly into a typical HDB bedroom. It is a practical choice for adults who sleep alone and want the freedom to move without feeling restricted.
Double (Full): 137 cm x 190 cm At 137 cm wide, a double mattress can fit two sleepers, though the personal space per person is limited. It works well for a single sleeper who wants more room, or for couples in smaller bedrooms where a queen would be too large. If you are sharing with a partner regularly, it is worth considering the queen for the extra width.
Queen: 152 cm x 190 cm The queen is the most widely chosen size for couples across Singapore. At 152 cm wide, it provides a meaningful amount of personal space for two people and fits comfortably in most standard HDB master bedrooms with room to spare on either side. It is often the most balanced choice between sleeping comfort and room efficiency.
King: 183 cm x 190 cm A king mattress at 183 cm wide offers generous sleeping space for two and suits couples who move around during the night or occasionally share the bed with children. It works well in landed homes and larger condo master bedrooms. As with any larger size, measure your room carefully and allow sufficient clearance around the bed before deciding.
Super King: 183 cm x 200 cm The super king shares the same 183 cm width as a standard king but adds an extra 10 cm in length, bringing it to 200 cm. That additional length makes a real difference for taller sleepers. If you are over 180 cm tall and tend to sleep on your back or stomach, the super king ensures full-body support without your feet reaching the edge of the mattress.
How to Use Metric Measurements to Plan Your Bedroom Layout
Before committing to a size, take a few minutes to measure your room properly. Use a tape measure and note the total floor dimensions in centimetres. Then sketch a simple layout to see where the bed will sit.
A comfortable bedroom should allow at least 60 to 90 cm of clearance on each side of the bed that you access regularly. This makes getting in and out of bed easy, and keeps the room feeling open rather than boxed in.
If you are working with a typical HDB master bedroom, a queen (152 cm x 190 cm) is usually the most practical fit. If your room is larger, a king or super king becomes a comfortable possibility. For secondary rooms or guest rooms, the super single (107 cm x 190 cm) tends to be the most efficient use of space.
Also check your existing bed frame if you are keeping it. Bed frames are built to specific metric dimensions, and a mismatch between the frame and the mattress will affect support and fit. It is worth confirming compatibility before you order.
Matching Metric Size to Your Sleep Situation
Getting the metric dimensions right is about more than just fitting the space. It is about giving yourself and anyone you share the bed with the room you need to sleep well.
Solo sleepers tend to find the super single the most sensible choice. It is wider than a single but does not take over a compact bedroom. If you move around a lot during the night, it gives you the freedom to do so without feeling crowded by the mattress edges.
Couples generally do best with a queen as a starting point. For those with more room to work with, a king at 183 cm wide adds meaningful personal space that reduces sleep disturbances when one person shifts position.
Taller sleepers should pay close attention to the length dimension. Most standard sizes run to 190 cm. The super king at 200 cm is the only size that offers noticeably more length and is worth considering for anyone who regularly feels their feet meet the end of the bed.
Families with young children who sometimes share the bed will find a king or super king far more comfortable for everyone. The additional width at 183 cm makes a real difference when there are three people in the bed.
How Mattress Type Affects Performance at Every Size
Once you have confirmed your metric size, the material inside the mattress determines how well it performs night after night, particularly in Singapore's warm and humid climate.
A latex mattress is naturally breathable and resilient, making it a strong choice for warmer nights. It holds its shape well across a larger surface, which matters for a king or super king where consistent support from edge to edge is important.
Memory foam offers excellent pressure relief and contouring. For those sharing a larger mattress, look for options with good airflow construction so warmth does not build up overnight.
For couples on a queen or king, a pocketed spring mattress is worth considering. Each individually wrapped coil responds independently, so movement on one side of the bed is far less likely to disturb the person on the other side. This is especially valuable across the wider metric dimensions of a king-sized sleeping surface.
You can explore all sizes and materials in the Somnuz mattress collection and find the combination that works best for your household.
See the Sizes in Person Before You Decide
Reading metric dimensions on a page and visualising them in your bedroom are two different things. A queen at 152 cm sounds specific on paper, but until you see and feel a mattress of that size, it can be difficult to know whether it is the right call for your home.
At our mattress showroom in Singapore, you can try the range in person across different sizes and materials. There is no pressure involved. Our team is there to help you think through the options based on your room, your sleep preferences, and who you are sharing the bed with.
For practical advice on building better sleep habits alongside the right mattress, our Sleep Well guide is a helpful place to start.
FAQs
What is the most common mattress size in metric for Singapore couples?
The queen, at 152 cm x 190 cm, is the most popular choice for couples in Singapore. It fits most HDB master bedrooms comfortably and gives two sleepers a reasonable amount of personal space. For those with more room available, the king at 183 cm x 190 cm offers noticeably more width.
What does 190 cm mean on a mattress size listing?
190 cm refers to the length of the mattress. Most standard mattress sizes in Singapore, from single through to king, share the same 190 cm length. The super king is the exception, running to 200 cm in length, which makes it better suited to taller sleepers.
Is the metric super single size the same across all Singapore retailers? The widely accepted metric standard for a super single in Singapore is 107 cm x 190 cm. However, minor variations of a centimetre or two can occasionally appear across different manufacturers. It is always worth confirming the exact dimensions of any mattress you are considering, particularly if you are matching it to an existing bed frame.
How do I convert metric mattress sizes to feet?
Divide centimetres by 30.5 to get feet. For example, a queen mattress at 152 cm x 190 cm works out to approximately 5 ft x 6 ft 3 in. For consistency and accuracy, it is easiest to work entirely in centimetres when measuring your room and comparing mattress sizes.
Can I use a king metric mattress in an HDB master bedroom?
It depends on the specific dimensions of your bedroom. A king at 183 cm x 190 cm can fit in some HDB master bedrooms, but you will need to check that there is sufficient clearance on the sides and at the foot of the bed. Measure your room carefully and account for any built-in wardrobes or other fixed furniture before deciding.
Does mattress thickness affect metric sizing?
Metric sizing refers to the surface dimensions, which are the width and length of the mattress. Thickness, also called height or profile, is listed separately. Thickness affects how the mattress feels and how it sits within your bed frame but does not change the footprint dimensions used to determine fit.
Find Your Size and Shop with Confidence
Understanding mattress sizes in metric makes the whole buying process more straightforward. With the right measurements in hand, you can choose a size that genuinely suits your room, your sleep style, and the people you share your bed with.
Browse the Somnuz mattress collection to explore options across all standard metric sizes, or visit our showroom to try the range in person. We are here to help you find the right fit without the guesswork.