Double vs queen mattress: the size difference

In the commonly listed South African standard sizes, a double mattress is about 137 cm wide by 188 cm long, while a queen is about 152 cm wide by 188 cm long. In other words, a queen keeps the same standard length but adds roughly 15 cm of width. The figures are reported consistently by South African bed and mattress size guides from Dial-a-Bed, The Mattress Warehouse and Bed King.

That extra width is useful, but it is not a dramatic jump in every bedroom. The right choice depends on whether you sleep alone or share, how much clearance your room allows, and whether your current base, headboard and linen match the size. Treat the dimensions as a starting point, not a substitute for measuring your actual space.

  • Double: approximately 137 cm × 188 cm in the standard South African format.
  • Queen: approximately 152 cm × 188 cm in the standard South African format.
  • The queen is about 15 cm wider; neither standard option is automatically longer than the other.

When a double mattress is the more practical choice

A double can make sense when floor space is tight, the bed is mainly for one person, or the room also needs space for cupboards, a desk or walking clearance. It can also suit a guest room where flexibility matters more than maximum sleeping width. A smaller footprint may make moving the bed through passages and doorways simpler, although the base and frame still need to be checked separately.

For two adults, a double is a compact compromise rather than a guarantee of spacious sleeping. Before choosing it, mark out 137 cm by 188 cm on the floor and consider the usable space around the bed. If either sleeper tends to move around, shares the bed with children or pets, or dislikes close quarters, the added width of a queen may be worth prioritising.

  • Measure the room with bedside tables, doors, wardrobes and walking paths included.
  • Choose a double when the smaller footprint is genuinely useful, not simply because the name sounds sufficient.
  • Check the base and headboard dimensions; a mattress size alone does not describe the whole bed.

When a queen mattress earns its extra space

A queen gives each person more side-to-side room than a double, which can make sharing feel less cramped. It is also a sensible middle ground for a main bedroom: wider than a double without moving to a king-size footprint. South African size guides list the standard queen at approximately 152 cm by 188 cm, but extra-length versions are also sold, so check the label rather than assuming every queen has the same length.

The extra width only helps if the room can accommodate it comfortably. Compare the footprint of both sizes on your floor plan, then allow space to open drawers, change linen and walk around the bed. If you are replacing an existing mattress, browse the broader options under [/mattresses](/mattresses), but filter by the exact width and length that your base supports.

  • A queen adds approximately 15 cm of width over a standard double.
  • It can be a useful compromise for couples who want more room without a king-size bed.
  • Confirm whether the queen is standard length or extra length before ordering linen or a base.

A decision checklist before you buy

Start with compatibility: measure the mattress, base, frame and available room in centimetres. Do not rely on labels alone, because size names can be used alongside standard and extra-length variants. Also check the thickness and edge design if your fitted sheets or headboard rely on a close fit. A mattress that is technically the right width can still be awkward if the supporting base is a different size.

Then consider your real sleeping arrangement. If you sleep alone and need floor space, a double may be enough; if you share and want fewer elbows at the edge, a queen is usually the more forgiving layout. Neither size fixes an unsuitable firmness or persistent pain. General comfort preferences vary, and ongoing sleep or pain symptoms should be discussed with a qualified health professional rather than treated as a mattress-sizing problem.

  • Measure first: room, base, frame, mattress and linen should all agree.
  • Choose for the people using the bed and the clearance they need, not only the room’s visual appearance.
  • If symptoms persist, seek professional advice; mattress size is not medical treatment.