Whether you're setting up a child's bedroom, furnishing a helper's room, or finding a practical solution for a smaller space, the single size mattress is often the starting point. It's compact, versatile, and fits into rooms where larger sizes simply won't work.
But before you buy, it helps to know the exact dimensions — and more importantly, how much space the complete setup will need in your room. Here's everything worth knowing.
Single Size Mattress Dimensions
A standard single size mattress measures approximately 91 cm wide by 190 cm long.
This is the dimension you'll find across most mattress brands in Singapore. As with all mattress sizes, exact measurements can vary slightly between manufacturers — sometimes by a centimetre or two — so it's always worth confirming with the specific brand before purchasing, particularly when matching to an existing bed frame.
In feet and inches, a single mattress is roughly 3 feet wide by 6 feet 3 inches long — useful when comparing across international brands or referencing older measurements.
How Single Size Dimensions Compare to Other Mattress Sizes
Seeing the single in context helps clarify whether it's the right fit — or whether a step up in size makes more sense.
|
Size |
Width (cm) |
Length (cm) |
|
Single |
91 |
190 |
|
Super Single |
107 |
190 |
|
Queen |
152 |
190 |
|
King |
183 |
190 |
|
Super King |
183 |
200 |
A few things stand out:
The single and super single share the same length — 190 cm — but the super single is 16 cm wider. For a child who is growing, or an adult who finds a single too narrow, the super single offers a meaningful upgrade without requiring a significantly larger room.
All standard sizes up to the king share the same 190 cm length. Only the super king adds extra length at 200 cm — relevant primarily for taller sleepers.
How Much Room Does a Single Size Mattress Need?
The mattress dimensions are only part of the picture. The more practical question is how much total floor space the complete setup requires — mattress, bed frame, and comfortable clearance around it.
As a working guide:
-
Side of the bed: Allow at least 60 cm on the accessible side for comfortable movement — getting in and out, making the bed, and accessing storage underneath if applicable.
-
Foot of the bed: Allow at least 90 cm between the end of the mattress and the nearest wall or wardrobe, so the room doesn't feel cramped.
-
Bed frame: Most single frames add a few centimetres to the overall footprint. Always confirm the frame's external dimensions separately from the mattress measurements.
Working from these clearances, a room of roughly 250 cm wide by 370 cm long can typically accommodate a single bed setup with adequate clearance. That said, room layout, door swing, and other furniture all affect this in practice.
The most reliable approach is to mark out 91 × 190 cm on your bedroom floor using masking tape before committing. It takes minutes and gives you a far clearer sense of how the bed will sit in the space than trying to visualise dimensions alone.
Who Is a Single Size Mattress Best For?
Children The single is the most common mattress size for children's rooms in Singapore. It fits comfortably in most HDB and condo secondary bedrooms, leaving enough floor space for a study desk, wardrobe, and room to play. For younger children, the compact size also feels appropriately scaled — a large mattress in a small child's room can feel unsettling rather than comfortable.
As children grow into teenagers, the single can start to feel narrow. This is typically the point where families consider stepping up to a super single, which offers more room without requiring a larger bedroom.
Helper's rooms Single mattresses are the standard choice for helper's accommodation in Singapore homes. The compact dimensions suit the typically smaller room sizes, and the single size provides a comfortable, adequate sleeping surface for one adult.
Guest rooms and multi-purpose rooms For a room that functions primarily as a study or hobby space but occasionally hosts a guest, a single bed takes up the least floor space while still providing a proper sleeping surface. Paired with a single mattress cover and fresh linen, it offers a considerate guest sleeping option without dominating the room.
Foldable and storage bed setups Most foldable beds and storage beds — the kind that fold into a sofa or pull out from under a platform — come in single size as standard. The compact dimensions make these space-saving setups practical for smaller Singapore homes.
Single Size Mattress Fit in Singapore Homes
Room sizes vary across Singapore's different housing types, and this affects how a single mattress sits within the space.
HDB flats Single mattresses fit comfortably in most HDB secondary bedrooms and helper's rooms. They're proportionally well suited to these smaller spaces — compact enough to leave room for other furniture without the room feeling overwhelmed by the bed.
Condos Secondary bedrooms in condos vary in size, but a single mattress typically fits well with room to spare. In very compact condo layouts where secondary rooms double as study spaces, a single is often the only practical option.
Landed homes Single mattresses are commonly used in children's rooms and guest rooms in landed properties. The additional floor space in larger homes sometimes makes a super single a more comfortable option for older children or regular guests.
If you're unsure which size works best for a specific room, our team at the Somnuz mattress showroom in Singapore is happy to help you think it through in person.
Single vs Super Single: When to Consider Stepping Up
The decision between a single and super single often comes up when furnishing a room for an older child or a teenager. It's worth thinking through honestly.
A single at 91 cm wide is comfortable for most children up to early teenage years. As teenagers grow — both in height and in the amount of space they naturally occupy during sleep — the single can start to feel restrictive.
The super single at 107 cm wide offers 16 cm of additional room. In most secondary bedrooms, this difference in mattress size doesn't require meaningfully more floor space, making the super single a practical upgrade for older children and teenagers without a significant room layout compromise.
For adults sleeping alone, the super single tends to be a more comfortable long-term choice than a single — unless the room is genuinely too small to accommodate the wider size.
Explore the Somnuz mattress collection to compare single and super single options side by side, and find the right fit for your room and the person sleeping in it.
Single Size Mattress and Bed Frame: Getting the Fit Right
A single mattress at 91 × 190 cm needs a single size bed frame with matching internal dimensions. A few details are worth confirming before you purchase:
Internal vs external frame dimensions The external footprint of a single frame is always slightly larger than the mattress. When planning your room layout, use the frame's external dimensions — not the mattress measurements — for an accurate picture of the total space the bed will occupy.
Slat spacing The frame's slats should support the mattress evenly across its full width. For foam mattresses, slat spacing of no more than 6–8 cm is generally recommended. Confirm this when buying the frame, particularly if the mattress and frame are sourced separately.
Storage frames Single beds with built-in storage drawers or hydraulic lift bases are popular in Singapore homes where space is at a premium. These frames tend to have a slightly larger external footprint than a standard frame — factor this into your room planning if storage is a priority.
Buying the mattress and frame together where possible, or carefully confirming dimensions when buying separately, avoids the frustration of a poor fit.
What to Look for in a Single Size Mattress
Once the dimensions are confirmed, the next consideration is what the mattress is made of and how it feels — particularly important for children, who spend a significant portion of their development years sleeping.
Support A good single mattress should support the natural alignment of the spine regardless of sleep position. For children, whose bodies are still developing, consistent support matters more than a particularly soft or cushioned feel.
Breathability Singapore's humidity makes airflow through the mattress a genuine priority. A mattress with breathable materials keeps the sleep surface cooler — relevant for children, who tend to sleep warmer than adults. Look for open-cell foam, ventilated construction, or natural fibre covers.
Durability A quality single mattress should maintain its support and comfort through years of use. For a child's bed, this means handling active sleeping — moving around, sitting on the edge, the occasional bounce — without losing its shape prematurely.
Easy care A removable, washable mattress cover is worth pairing with any single mattress, particularly in a child's room. It keeps the mattress itself clean and extends its lifespan considerably.
FAQs: Single Size Mattress Dimensions
What are the standard single size mattress dimensions in Singapore? A standard single size mattress measures approximately 91 cm wide by 190 cm long. Dimensions can vary slightly between brands, so always confirm before purchasing — particularly when matching to an existing bed frame.
What is a single mattress size in feet? A single mattress is approximately 3 feet wide by 6 feet 3 inches long. Most Singapore retailers list dimensions in centimetres, but this conversion is useful when comparing across international brands.
What is the difference between a single and super single mattress? A super single is 107 cm wide compared to 91 cm for a standard single — a difference of 16 cm. Both are 190 cm long. The super single suits older children, teenagers, and adults who find a single too narrow but don't need the full width of a queen.
What room size do I need for a single bed? As a general guide, a room of at least 250 cm wide by 370 cm long can accommodate a single bed with comfortable clearance. Mark out the dimensions on your floor with masking tape to get a realistic sense of the fit before committing.
Will a single mattress fit in an HDB secondary bedroom? Yes, in most cases comfortably. Single mattresses are well suited to standard HDB secondary bedrooms and helper's rooms, leaving adequate floor space for other furniture.
At what age should a child move from a single to a super single? There's no fixed age, but many families make the switch during early to mid-teenage years, when children grow taller and begin to feel restricted by the narrower single width. If the room allows for it, a super single is often a more comfortable long-term investment for a growing child.
Find the Right Single Mattress for Your Home
Understanding the single size mattress dimensions is a practical starting point — but the right choice also depends on who is sleeping on it, how the room is laid out, and what level of comfort and support makes sense for your situation.
Browse the Somnuz mattress collection to explore single and super single options, or visit our showroom to see the range in person and get clear, unhurried guidance from our team.