The right bed size has more influence on a bedroom than almost any other choice. It affects how the room is laid out, how comfortable the bed feels each night and how the wider furniture sits around it. UK sizing is its own quiet system, slightly different from European or American sizes, and that matters when bedding, mattresses and frames are being chosen together.
Below, we walk through the main British bed sizes and the homes they suit, drawing on the patterns we see across our customers at Furniture in Fashion.
British bed sizing follows a familiar scale. A single measures around 90 by 190 centimetres, a small double sits at 120 by 190 centimetres, a standard double is 135 by 190 centimetres, a king size is 150 by 200 centimetres, and a super king extends to 180 by 200 centimetres. These dimensions guide both the frame and the mattress, which is why sticking to UK measurements simplifies bedding choices later.
Continental sizes such as 140 or 160 centimetres also appear, but mattresses and bedding for these can be harder to source in the UK. Where possible, it is sensible to keep to standard British sizes for ease of replacement and accessory choice.
The single bed has not disappeared. It remains the practical choice for younger children, smaller guest rooms and box rooms in older terraced homes. Modern single designs feel more refined than the simple frames of the past, with quiet upholstered headboards, slim wooden bases and storage drawer options.
Within our beds range, the single category includes designs suitable for both children and adults, with finishes that suit considered bedrooms.
The small double, sometimes referred to as a four foot bed, fills the gap between a single and a standard double. It is widely used in compact British rooms where a full double is too generous. For solo sleepers who like more room, or for rooms where storage furniture also has to fit, this size often delivers the best balance.
Bedding for small doubles is widely available in the UK, although the choice is slightly narrower than for standard doubles, so this is worth bearing in mind when planning a refresh.
The standard double remains the most widely chosen size in British homes. It accommodates two adults comfortably for most rooms and pairs well with a broad range of bedside cabinets and chests. In modern homes with mid sized bedrooms, a double frame keeps the room feeling balanced, especially when paired with a slimmer headboard.
Mattress quality is particularly important at this size. Browse our mattresses selection to see options that suit different sleep preferences and sit well on modern frames.
King and super king sizes belong in main bedrooms with more generous proportions. A king feels appropriately spacious in a room that allows a clear walkway on both sides and a chest or dressing table without crowding. A super king reads beautifully in larger bedrooms but can dominate if the rest of the room cannot match its scale.
If the bedroom is also used for getting ready or has a corner for a comfortable chair, the larger sizes still need to leave room for the wider routine. Measuring carefully always pays off.
UK mattress depth varies more than the sizes themselves. Modern mattresses often run between twenty and thirty centimetres deep, with hybrid and pocket spring options at the deeper end. A taller mattress changes how a bed reads visually and how easy it is to dress with sheets and a duvet.
When choosing a frame, check whether the slats or base support the mattress evenly and whether bedding will sit neatly without exposing the base around the edges.
A larger bed always asks for more clearance, not just within the room but at the door, on the stairs and along corridors. Older British homes can have narrow access points that make a super king difficult to deliver in one piece. Many modern frames now arrive in flat packed sections to address this, but it is still worth measuring access carefully before ordering.
The bed size also affects bedside furniture. A king or super king pairs comfortably with two cabinets, while a double often suits one cabinet plus a small chair or stool on the opposite side.
For couples, the largest size that the room and access can accommodate often delivers the best long term comfort. For solo sleepers, a small double or double can feel pleasingly spacious without dominating the room. For children, a single allows space for play, study and storage to coexist with the bed.
No. UK sizes differ slightly from European measurements, which can affect mattress and bedding availability.
It depends on the room. In main bedrooms with reasonable clearance, a king is comfortable. In smaller rooms, a double or small double often suits better.
A king is 150 centimetres wide, while a super king extends to 180 centimetres. The super king offers more sleeping space but needs a noticeably larger room.
Start with the room. Once you know what fits with comfortable clearance, choose the mattress to suit the size and your sleeping preferences.
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