A wooden king size bed in the UK holds a 150 by 200 cm mattress, which is 15 cm wider and 10 cm longer than a standard double. It suits rooms of roughly 3 by 3.5 metres or larger, needs a centre support rail with feet, and works best with a closely spaced slatted base. Beyond those basics, the choice comes down to timber, frame style, headboard height and how the bed fits the rest of your room.
That extra width makes a real difference for couples, and the extra length is welcome for taller sleepers. Our range of wooden king size beds UK includes oak, walnut, ash and painted frames, and this guide covers what to check before you choose one.
It is easy to assume bed sizes are the same everywhere, but UK sizes differ from European and American ones. A UK king size mattress measures 150 by 200 cm. A European king size is often 160 by 200 cm, and a US king is wider again. If you buy a frame and mattress from different places, check that both are UK sizing to avoid gaps or a mattress that will not fit.
A UK double is 135 by 190 cm, so a king size gives each sleeper an extra 7.5 cm of width and an extra 10 cm of length overall. That may not sound like much, but many couples find it is the difference between a restful night and constant disturbance.
A super king is 180 by 200 cm, a full 30 cm wider than a king. If you share your bed with a partner who moves a lot, or with children and pets on weekend mornings, it may be worth considering. The right frame, however, matters just as much as the mattress, so it pays to understand how each size translates into floor space.
The mattress is only part of the footprint. A wooden king size frame can add anything from a few centimetres to well over 20 cm in each direction, depending on the thickness of the rails, the depth of the headboard and whether there is a footboard.
As a general guide, allow around 60 to 70 cm of clear floor on each side of the bed and at the foot. That gives room to make the bed, open bedside drawers and walk past comfortably. In practice, a king size bed sits well in a room of about 3 by 3.5 metres or more. Smaller rooms can work, but you may need to give up bedside cabinets or position the bed against a wall.
Check your access as well. A solid wood king size bed arrives in several large pieces, and the headboard is often the bulkiest. Measure the narrowest point of your stairs, landings and doorways before you choose.
Oak is a common choice for king size frames because it is hard, strong and attractive. It has a warm honey tone and a pronounced grain, and it ages gracefully. Walnut is darker and richer, with a finer grain that suits more tailored rooms. Ash is pale and bright with a bold straight grain, and it is harder than many people expect.
Pine and rubberwood are lighter and usually less costly, and a well built frame in either can perform very well. Engineered wood with an oak or walnut veneer is also widely used and is stable in centrally heated homes. Whatever the material, look at how the frame is made, not just what it is made from.
A king size bed carries more weight than a double, so its structure needs to be sound. The most important element is the centre support. Look for a central rail running from headboard to footboard with at least one, and ideally two or more, adjustable feet that reach the floor. Without this, the side rails bow over time and the mattress can sag in the middle.
Slats should be closely spaced and secured in place. Sprung slats give a little flex, which suits many foam and hybrid mattresses. Solid slats feel firmer. Either is fine provided the gaps meet your mattress maker's guidance.
Joints should be bolted with metal fittings rather than screwed directly into timber or board. Corner brackets and metal inserts help a frame stay rigid and quiet for longer. Retighten everything after the first few weeks, as wood settles.
A low platform king size bed feels calm and modern and keeps a room open. A frame with a tall panelled headboard creates a focal point and gives you something to lean against while reading. A sleigh bed, with its curved head and foot, brings a traditional character but takes up more length. A four poster frame is dramatic and works best in a room with generous ceiling height.
Consider the footboard carefully. A high footboard looks elegant but can make the bed feel shorter, which matters to taller sleepers. A low or absent footboard makes the room feel larger and the bed easier to make.
Think too about how the bed relates to your other furniture. Our full collection of modern bedroom furniture UK includes storage and bedside pieces designed to sit comfortably beside larger frames.
If your room comfortably takes a king size with space to spare, a super king is worth a thought. The extra 30 cm of width transforms how two people sleep, particularly if one is a restless sleeper or if young children often join you in the morning.
The trade off is space and weight. A super king frame is substantially larger and heavier, so check both your floor area and your access. Our range of super king size wooden beds UK lets you compare frames side by side with king size options.
A king size mattress is a significant purchase in its own right, and the frame needs to suit it. Memory foam and hybrid mattresses usually need a firm, evenly supported base with close slats. Pocket sprung mattresses are slightly more forgiving but still benefit from good central support.
Check the depth of the frame's sides against the depth of the mattress you plan to use. A deep mattress in a frame with high side rails can look balanced, while a slim mattress in the same frame may sit too low. Our range of mattresses UK sale covers a variety of depths and constructions to suit different frames.
A king size bed looks most balanced with a matching or complementary bedside cabinet on each side. The top of each cabinet should sit at or slightly above the mattress height for easy reach. If space is tight, a slim cabinet or wall mounted shelf can keep the symmetry without crowding the room.
Place the bed on the wall that faces the door if you can, as this is usually the most welcoming arrangement. Avoid placing it directly under a window where draughts and morning light can disturb sleep, and keep it clear of radiators to protect the timber. For a fuller breakdown of frame sizes and room planning, our guide to UK king size bed dimensions goes into the measurements in detail.
The headboard on a king size bed is a large surface, and its height changes how the whole room feels. A low headboard keeps the room open and suits windows positioned behind the bed. A taller headboard, rising well above the pillows, gives a comfortable backrest for reading and creates a natural focal point on a plain wall.
If you enjoy sitting up in bed, look for a headboard with a gently angled or padded section, or plan to use a pair of firm cushions against a flat timber panel. In a loft room, check the height against the slope of the ceiling before you choose.
Dust with a soft dry cloth and avoid harsh cleaning sprays. Oiled finishes benefit from an occasional top up, typically once or twice a year. Lacquered finishes need very little beyond dusting. Keep the bed out of strong direct sunlight if you want to slow colour change, and check the bolts every few months.
Look after it well and a good wooden king size bed can serve for many years, moving with you from home to home. You can explore our full range at Furniture in Fashion, with free delivery to most UK mainland postcodes.
A UK king size mattress measures 150 by 200 cm. The frame will be larger, depending on the thickness of the rails and the style of the headboard and footboard.
No. A European king size is often 160 by 200 cm, which is wider than a UK king. Always match your frame and mattress to the same sizing system.
A room of around 3 by 3.5 metres or larger usually works well, allowing about 60 to 70 cm of clear floor on each side and at the foot of the bed.
Yes. A central rail with feet that reach the floor is essential for a king size frame, as it prevents the side rails bowing and keeps the mattress evenly supported.
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