Queen vs king mattress size: the quick comparison

In South Africa, a standard queen mattress is commonly listed as 152 cm wide by 188 cm long, while a standard king is 183 cm wide by 188 cm long. That makes the king 31 cm wider, with the same standard length. These dimensions are reported consistently in public South African size guides from [Bed King](https://www.bedking.co.za/mattress-and-base-sizes.php) and [Dial-a-Bed](https://www.dialabed.co.za/shop-by-size).

The simplest way to frame the choice is width versus floor space. A queen can be easier to place in a smaller main bedroom, while a king gives two sleepers more room to spread out. Neither size is automatically the better mattress: it is the size that works with your room, your bed base, your sleeping arrangement and the other furniture you need to use comfortably.

  • Queen: commonly listed at 152 × 188 cm.
  • King: commonly listed at 183 × 188 cm, or 31 cm wider than a queen.
  • Measure the mattress, base and available floor area separately before ordering.

How much extra sleeping space does a king give you?

The extra 31 cm of width is the main practical difference. Shared between two adults, that is about 15.5 cm of additional width per person if divided evenly. That does not predict how comfortable anyone will feel, but it explains why a king may feel less restrictive for people who change position, prefer more personal space or share the bed with a child or pet from time to time.

A queen still offers a full 152 cm of width and may be a sensible balance for couples who want shared space without allowing the bed to dominate the room. If you are unsure, mark both mattress footprints on the floor with masking tape or newspaper, then walk around them and open drawers and cupboards before making a decision. For more options, browse the range on our [mattresses page](/mattresses) and compare the size labels rather than relying on names alone.

  • Use the 31 cm width difference as a planning measurement, not as a promise of better sleep.
  • Test whether both sleepers can lie in their usual positions without crowding each other.
  • Include children, pets and regular bedtime movement in your real-life space check.

Room fit, bases and linen: the details people miss

A mattress is not the only footprint to plan for. A bed base, headboard, side tables and any frame lip can make the finished bed larger than the mattress dimensions. Leave enough usable space to get in and out of bed, reach storage and move safely around the room. Also check the route into the bedroom: corners, stairwells and door openings can matter as much as the final floor area.

Length deserves a separate check, especially for taller sleepers. The public South African guides consulted list extra-length options at 200 cm, including an extra-length king at 183 × 200 cm. Extra length is not the same as extra width, and it usually requires matching extra-length fitted sheets and a compatible base. Confirm the exact specification with the manufacturer or retailer before buying.

  • Measure the assembled base or frame, not only the advertised mattress size.
  • Check fitted-sheet dimensions and whether your current duvet and protector will fit.
  • For a tall sleeper, compare 188 cm and 200 cm lengths before choosing a wider size.

Which should you choose: queen or king?

Choose a queen when the bedroom is compact, you need clear walking routes or you would rather keep space for cupboards and bedside furniture. It can also suit a solo sleeper who wants generous room without using the footprint of a king. Choose a king when the room can accommodate the wider base and both sleepers value extra personal space more than the additional floor area.

Treat the size decision separately from firmness, materials and comfort preference. A larger mattress does not fix persistent pain, numbness or disrupted sleep; if symptoms continue, speak to a qualified health professional. Before you commit, write down the exact width and length, confirm the base compatibility and check the exchange or return terms that apply to the specific product.

  • Pick queen for a tighter room or when circulation and furniture placement matter most.
  • Pick king when extra width is a priority and the room can comfortably absorb it.
  • Confirm product dimensions, base compatibility, linen fit and applicable terms in writing.