Choosing a mattress is about more than comfort. Before you even think about firmness or materials, you need to get the size right. Too small and you will wake up cramped and restless. Too large and you are fighting your own bedroom furniture.
In Singapore, where HDB rooms and condo layouts come with very specific dimensions, getting the size wrong is a frustratingly common mistake. This guide walks you through every standard mattress size in centimetres so you can measure, compare, and decide with clarity.
Standard Mattress Sizes in CM: What Singapore Uses
Singapore generally follows international sizing conventions with a few local preferences that are worth knowing. Here is a clear breakdown of every size you will encounter when shopping.
Single: 91 cm x 190 cm The single mattress is designed for one sleeper and is the go-to choice for children's rooms, guest rooms, and smaller HDB bedrooms. It fits neatly into most standard single bed frames and leaves useful floor space in compact rooms.
Super Single: 107 cm x 190 cm The super single is one of the most popular sizes in Singapore and it is easy to see why. It gives a solo sleeper noticeably more room than a standard single without taking up as much floor space as a double. It works well in teenager's rooms, smaller master bedrooms, and for adults who prefer sleeping alone with a bit more freedom to move.
Double (Full): 137 cm x 190 cm A double mattress fits two adults, though it can feel cosy rather than spacious. It is a practical option for couples in smaller rooms or for a single sleeper who wants more width. If you are sharing with a partner regularly, you may find a queen is worth the extra space.
Queen: 152 cm x 190 cm The queen is the most widely chosen size for couples in Singapore. It offers a comfortable amount of personal space for two people without dominating a typical master bedroom. Most standard HDB master bedrooms can accommodate a queen frame with room to move around comfortably.
King: 183 cm x 190 cm A king mattress is a strong choice for couples who want more sleeping space, especially if one or both of you tend to move around during the night. It suits landed homes and larger condo bedrooms well. Do measure your room carefully and account for bedside tables and clearance on all sides before committing.
Super King: 183 cm x 200 cm The super king adds an extra 10 centimetres in length compared to a standard king, making it ideal for taller sleepers or those who simply want the most generous sleeping surface available. It suits spacious master bedrooms and is particularly popular in larger condos and landed properties.
Why Size Matters More Than You Think
It is tempting to focus straight on feel and firmness when shopping for a mattress, but size affects your sleep more directly than most people expect.
A mattress that is too small means you are unconsciously staying still to avoid falling off the edge, which disrupts your natural sleep movements. A mattress that is too large for your room creates a cramped, cluttered feeling that does not make for restful surroundings.
For couples, the right size can also reduce sleep disturbances. If your partner moves around, a larger surface means those movements are less likely to roll your way. This is also where the internal structure of a mattress matters. A pocketed spring mattress, for example, uses individually wrapped coils that absorb motion independently, so a larger sleeping surface works in your favour even more.
How to Measure Your Room Before You Shop
This step is worth doing properly. Here is a simple approach:
First, measure the total floor space of your room and sketch a rough layout. Mark where your windows, door swings, and built-in wardrobes sit.
Then account for clearance. A comfortable bedroom should have at least 60 to 90 cm of walking space on each accessible side of the bed. This is not just about aesthetics. It is about being able to get in and out of bed easily, especially in the middle of the night.
If you are working with a typical HDB master bedroom, a queen is usually the sweet spot. If you are in a condo or landed home with a more generous layout, a king or super king becomes a realistic and comfortable option.
Always measure your existing bed frame too if you are keeping it. Not all frames are designed to accommodate every mattress size, and a mismatch will cause problems with support and fit.
Choosing by Sleeper Type
Solo sleepers: A super single gives you the best balance of personal space and room efficiency. If you sleep with a pet or like to spread out, a queen is worth considering.
Couples: A queen is the most practical starting point for most Singapore bedrooms. If budget and room size allow, a king offers meaningful gains in comfort and undisturbed sleep.
Families with young children: If little ones occasionally join you in bed, sizing up to a king makes the arrangement far more comfortable for everyone.
Taller sleepers: Anyone over 180 cm should consider a super king for the extra length, particularly if you tend to sleep on your back and need full-body support without your feet hanging over the edge.
Mattress Materials and How They Interact With Size
Once you have your size confirmed, it is worth thinking about what goes inside the mattress, as it affects how the larger surface performs night after night.
In Singapore's humid climate, breathability matters. A latex mattress is naturally breathable and resilient, which suits warmer nights well. Memory foam offers excellent pressure relief and contouring, though look for options with open-cell or aerated construction to avoid heat retention.
For couples on a king or queen, motion isolation is worth prioritising. Pocketed spring construction helps here, as each spring moves independently, meaning your sleep is less affected by your partner's movements.
You can explore the full range in the Somnuz mattress collection to find the right combination of size, support, and material for your needs.
Reassurance: You Do Not Have to Decide Alone
Shopping for a mattress, especially at larger sizes, is a considered investment. It is completely reasonable to want to see and feel the options before committing.
At our mattress showroom in Singapore, you can try the range in person, ask questions, and take the time you need. There is no pressure. Our team is there to help you find what actually works for your room, your sleep style, and your household.
If you would like to learn more about building healthier sleep habits alongside a well-suited mattress, our Sleep Well guide is a good place to start.
FAQs
What is the most popular mattress size in Singapore?
The queen size (152 cm x 190 cm) is the most popular choice for couples in Singapore. For solo sleepers, the super single (107 cm x 190 cm) is particularly well-suited to local bedroom dimensions.
Will a queen mattress fit in an HDB master bedroom?
In most cases, yes. A standard HDB master bedroom can comfortably accommodate a queen bed frame with sufficient clearance on the sides. It is always worth measuring your specific room first, particularly if you have built-in wardrobes or other fixed furniture.
What is the difference between a king and a super king?
A king mattress measures 183 cm x 190 cm. A super king measures 183 cm x 200 cm. The difference is 10 centimetres in length, which makes a noticeable difference for taller sleepers. The width is the same for both.
Is a super single the same as a full or double?
No. A super single (107 cm x 190 cm) and a double (137 cm x 190 cm) are different sizes. The super single is narrower and is typically designed for one sleeper, while a double can accommodate two adults, though with less personal space than a queen.
How much floor clearance should I leave around my mattress?
A comfortable guideline is 60 to 90 cm of clearance on each accessible side of the bed. This allows for easy movement, especially when getting up in the night, and keeps the room feeling open rather than cramped.
Can I use a Singapore-sized mattress with an overseas bed frame?
Sizing standards can vary slightly between countries. If you are purchasing a bed frame from overseas or using an existing international frame, measure carefully before buying. Even a few centimetres of difference can affect how the mattress sits and performs in the frame.
Find the Right Fit for Your Bedroom
Getting your mattress size right is the first and most important step towards genuinely restful sleep. Once you have that foundation, everything else, from material to firmness, can be chosen with much more confidence.
Browse the Somnuz mattress collection to explore options across every size, or visit our showroom to try them in person. Our team is always happy to help you find the right match for your room and your rest.