A king bed gives two adults noticeably more room than a queen: about 91cm each, the width of a single mattress, against about 76cm each on a queen, with space left for a child or a pet on weekend mornings. So why would anyone choose a queen? Because in many 4-room master bedrooms, a king leaves little room to walk or for bedside tables, and turns your bedroom into a bed with a door.
The sizes
Singapore mattress sizes follow their own convention — close to, but not the same as, US or UK sizes — and brands can differ by a centimetre or two. The usual figures:
- Single: 91 × 190cm
- Super Single: 107 × 190cm
- Queen: 152 × 190cm
- King: 183 × 190cm
Larger "super king" sizes exist too, but they vary from brand to brand. And remember these are mattress sizes. A bed frame is bigger, sometimes by 30–40cm in width and length once you add a padded headboard, so always plan with the frame's own dimensions.
A king is 31cm wider than a queen — roughly the width of a laptop. That's not a lot in isolation. But in a 3m-wide bedroom, it's the difference between a comfortable walkway and a squeeze.
Typical HDB master bedroom dimensions
Master bedrooms vary by flat type and year, but in a 4-room flat one is often somewhere around 3m × 3.5m. Put the headboard against a 3m wall and do the maths with the frame, not the mattress. A queen frame of around 160–170cm leaves roughly 130–140cm, about 65cm a side: room for a bedside table and a comfortable path on both sides. A king frame of around 190–200cm leaves roughly 100–110cm, or about 50–55cm a side: workable, but tight once bedside tables go in. If a built-in wardrobe runs along the side of the bed, take its depth (around 60cm), plus space to open its doors, off those figures first.
Executive flats and many 5-room flats have bigger master bedrooms, where a king fits far more easily. Condo bedrooms vary widely, so measure rather than assume.
The 60cm walkway rule
A common rule of thumb is about 60cm of clear floor between the bed and the nearest wall or wardrobe on each side you get in from, and more in front of a wardrobe with swing doors. This isn't luxury — it's the minimum space you need to get out of bed without turning sideways. When one partner needs to use the bathroom at 3am, that walkway is the difference between a groggy bathroom trip and a stubbed toe.
Where a king fits
A king makes sense if any of these apply:
- Your master bedroom is 3.5m wide or more (more common in executive and 5-room flats)
- Your wardrobes are freestanding or in a separate walk-in, not eating into the bedroom footprint
- You regularly co-sleep with children or pets and have felt cramped on a queen
One thing a king won't fix is length. In Singapore a king mattress is the same 190cm long as a queen, so if one of you is tall, look for a longer mattress and a frame to match rather than going wider.
Where a queen is the right call
A queen is the usual choice in 4-room flats, and there's no shame in it:
- Room is 3.2m wide or narrower
- Built-in wardrobe along one full wall
- You want room for two bedside tables (not negotiable — don't skip these)
- Your budget is tight (queen mattresses, frames and bedding usually cost less than king)
Side tables: can you still fit them?
Bedside tables are typically 40–50cm wide and 35–45cm deep. Against a 3m wall, a king frame of around 190–200cm leaves about 50–55cm a side: a table fits, barely, with little to spare beside it. A queen frame leaves about 65cm a side, which is comfortable.
Frame considerations
Storage bed frames (with drawers or a lift-up base) are popular in HDB homes because they reclaim under-bed space. They're heavier, harder to move and usually cost more than a plain frame. If you need the storage, go storage. If not, a simple platform frame is lighter on the room visually. Our bed frames come in Super Queen and Super King, with the full frame dimensions for each size on the product page, and some offer an under-bed storage lift as an add-on. Our guide to hydraulic vs drawer storage beds compares the options.
Browse our bed frames →Browse our side tables →
