Double Mattress Size: Dimensions, Room Fit, and Is It Right for You?

If you've been researching mattress sizes and come across the term "double mattress", you may have noticed that it doesn't always appear on Singapore retailer websites the way it does in the UK or Australia. That's not an oversight — it reflects a genuine difference in how mattress sizes are named and sold across different markets.

Understanding what a double mattress size actually means, how it compares to what's available locally, and whether it's the right choice for your home is a practical starting point before making any decisions.

What Is a Double Mattress Size?

A standard double mattress measures approximately 135 cm wide by 190 cm long.

This is the dimension used in the UK and many European markets. In Singapore, the double size is not a standard offering across most mattress retailers — the local size range typically moves from super single (107 cm wide) directly to queen (152 cm wide), skipping the double in between.

For reference, here is how the double sits alongside the sizes more commonly available in Singapore:

The double sits between the super single and queen — wider than a super single but narrower than a queen by 17 cm.

Is a Double Mattress the Same as a Queen?

No — though the two are sometimes confused, particularly when shopping across international brands or referencing older measurements.

A queen mattress is 152 cm wide. A double is 135 cm wide. That 17 cm difference is noticeable for two people sharing the bed — it's the difference between comfortable and slightly cramped for most adult couples.

In Singapore, the queen is the local equivalent of the double in terms of its role — the standard size for couples — but it's meaningfully larger. If you see a mattress or bed frame described as "double queen" or "full queen", this is typically referring to the queen size rather than a separate category.

If you're buying in Singapore, shopping for a queen rather than a double will give you more options, better availability, and a more comfortable sleep surface for two.

Why the Double Size Is Less Common in Singapore

Mattress sizing conventions vary by region, and Singapore follows a different standard from the UK and Australia. The local market skips the double and moves from super single to queen — partly because the queen is simply the more practical size for couples, and partly because Singapore retailers have aligned with sizing conventions closer to the US and international standard.

This means that if you're looking for a double mattress specifically — perhaps because you have a double bed frame from overseas, or because you're matching an existing setup — availability in Singapore can be limited. Most local retailers will not stock double size as a standard option.

If you're working with a double bed frame and need a replacement mattress, it's worth measuring the internal frame dimensions carefully before purchasing. In some cases, a queen mattress will not fit a double frame — the 17 cm width difference matters when it comes to frame compatibility.

What to Buy Instead of a Double in Singapore

If you're in the market for a mattress that sits between a super single and a queen, the honest answer in Singapore is that the queen is your most practical option.

Queen over double for couples At 152 cm wide, a queen gives two adults a more comfortable shared sleeping surface than a double. For most HDB and condo master bedrooms, a queen fits well with adequate clearance — and the additional width compared to a double makes a real difference in day-to-day sleep comfort.

Super single for solo sleepers If a double was being considered for a solo sleeper — as is common in some European households — the super single at 107 cm wide is the local equivalent. It offers comfortable personal space without the footprint of a queen, and fits well in most HDB and condo secondary bedrooms.

Explore the Somnuz mattress collection to compare queen and super single options, and find the size that suits your room and sleep situation best.

Room Fit: How Much Space Do You Need?

Whether you're considering a double, a queen, or a super single, working out room fit follows the same practical approach.

Mark out the mattress dimensions on your bedroom floor using masking tape before you buy. Allow at least:

• 60 cm on each accessible side of the bed for comfortable movement

• 90 cm at the foot of the bed so the room doesn't feel closed off

• A few extra centimetres for the bed frame's external footprint beyond the mattress dimensions

For a queen at 152 × 190 cm, a room of roughly 340 cm wide by 370 cm long typically accommodates the setup comfortably. For a super single at 107 × 190 cm, the room requirements are noticeably more modest — useful in smaller secondary bedrooms or rooms that serve more than one function.

If you'd like to talk through room fit for your specific space, our team at the Somnuz mattress showroom in Singapore is happy to help in person.

 

If You Have a Double Bed Frame: What Are Your Options?

If you already own a double bed frame — perhaps brought from overseas or purchased from an international retailer — and need a replacement mattress, there are a few practical paths forward.

Measure the internal frame dimensions carefully Double frames vary slightly in their exact internal dimensions. Some may be closer to 135 cm, others may have slightly different measurements. Confirm the exact internal width and length before purchasing any mattress.

Check whether a custom size is available Some mattress retailers can produce mattresses in non-standard dimensions. This is not universally offered, and it typically comes at a higher price, but it's worth enquiring if you're committed to keeping the existing frame.

Consider replacing the frame alongside the mattress If the double frame is ageing or no longer performing well, replacing it with a queen frame and queen mattress may be a more practical long-term solution than trying to source a non-standard mattress size. A queen frame and mattress bought together gives you better availability, more choice, and a more comfortable sleep surface.

Visit our mattress store in Singapore or speak to our team for guidance on the most practical approach for your situation.

 

What to Look for in a Mattress — Whatever the Size

Once the size question is resolved, the next consideration is what the mattress is made of and how it performs night after night. A few qualities are worth prioritising regardless of which size you settle on.

Support and spinal alignment A good mattress supports the natural curve of the spine in your preferred sleep position — whether that's on your side, back, or stomach. For a shared bed, a medium feel tends to work across the widest range of sleep positions and body types.

Motion isolation For couples sharing a bed, how well the mattress absorbs movement matters. A mattress with good motion isolation means that when one person shifts during the night, the other doesn't feel it travel across the surface.

Breathability Singapore's humidity makes a cool, breathable sleep surface more than a comfort preference — it genuinely affects how well you sleep. Look for mattresses with open-cell foam, ventilated construction, or natural fibre covers that allow air to circulate through the night.

Durability A quality mattress should maintain its support and comfort for seven to ten years with normal use. High-density foam, quality pocket spring construction, and reinforced edges are markers of a mattress built to last.

 

FAQs: Double Mattress Size

What is the standard double mattress size in cm? A standard double mattress measures approximately 135 cm wide by 190 cm long. This size is common in the UK, Europe, and Australia but is not a standard offering across most Singapore mattress retailers.

Is a double mattress the same as a queen in Singapore? No. A double is 135 cm wide while a queen is 152 cm wide — a difference of 17 cm. In Singapore, the queen is the standard size for couples and the closest local equivalent to the double, though it is meaningfully larger.

Can I buy a double size mattress in Singapore? Availability is limited, as most local retailers stock super single and queen rather than double. If you specifically need a double size — for an existing frame, for example — it's worth contacting retailers directly to check availability or enquire about custom sizing.

Will a queen mattress fit a double bed frame? Not reliably. A queen at 152 cm wide is 17 cm wider than a standard double frame designed for a 135 cm mattress. Always measure the internal dimensions of the frame carefully before purchasing a replacement mattress.

What should I buy instead of a double mattress in Singapore? For couples, a queen is the most practical alternative — wider, more comfortable for two, and readily available across Singapore retailers. For solo sleepers, a super single offers comfortable personal space in a compact footprint.

How does a double mattress size compare to a king? A king is 183 cm wide compared to a double's 135 cm — 48 cm wider. Both are 190 cm long. The king is a considerably larger sleep surface, suited to couples who want generous room and have a bedroom to match.

 

Find the Right Size for Your Home

Whether you're navigating the double versus queen question or simply working out which mattress size makes sense for your room, the most important thing is finding a setup that suits how you actually sleep.

Browse the Somnuz mattress collection to explore queen, super single, and king options — or visit our showroom to try the range in person and get clear, practical guidance from our team.