King Size Headboard Sizes Explained: Widths and Fittings

Buying a headboard sounds like the simplest part of putting a bedroom together. In practice it is where a surprising number of orders go wrong, because a headboard has to match three separate things at once: the width of the bed, the height you actually want it to sit at, and the way it attaches to the base or the wall. Get any one of those wrong and the board either will not fit, will not line up, or will sit at an angle that looks accidental.

This guide sets out the numbers plainly. Exact UK king widths, how they differ from the continental and American sizes that appear in online listings, what height options mean in a real room, and how the three main fixing types differ. There is also a step-by-step method for measuring an existing bed before you order a replacement.

The exact UK king size headboard width

A UK king size bed measures 5ft by 6ft 6in, which is 150cm wide by 200cm long. A headboard sold as UK king size is therefore 150cm wide.

That is the figure to hold on to. Everything else in the listing, the height, the depth of the padding, the style of the fixings, varies from maker to maker, but the width for a UK king is fixed by the bed size itself.

One caveat worth knowing: some headboards are made marginally wider. A board at 152cm or 155cm is usually designed to overhang the mattress very slightly on each side, which can look deliberate and neat, particularly on a deep buttoned or winged style. This is a styling decision rather than an error. What matters is that you know which you are getting, because a 155cm board will not sit flush between built-in wardrobes with a 152cm gap.

UK king compared with continental and US king

This is the single most common ordering mistake, and it comes from buying on a marketplace where sellers list to several markets at once.

• UK king: 150cm wide (5ft)
• UK super king: 180cm wide (6ft)
• European king: commonly 160cm wide, though 180cm is also sold under the same name
• US king: roughly 193cm wide

A European 160cm headboard on a UK 150cm bed leaves a visible 5cm overhang on each side. On some styles that reads as intentional. On a board designed to sit flush with a divan, it does not, and it will also foul any bedside furniture pushed tight to the bed.

A US king headboard at 193cm on a UK king bed is 43cm too wide. There is no way to style that out.

The tell is usually in the description. If the listing quotes the size in inches only, or gives a width that is not 150cm, check carefully before ordering.

Headboard height options and how to choose

Height is where personal preference actually comes into play, but it still needs to be measured rather than guessed.

Headboard height is quoted in two different ways, and the difference matters:

• Overall height from the floor. Used for floor-standing headboards, where the legs reach the ground. This is the number you compare against windows, picture rails and sloping ceilings.
• Height of the board itself. Used for strutted headboards, where the struts raise the board and the quoted height is just the padded panel. The finished height from the floor depends on your bed base.

For a king size board, the panel height commonly sits somewhere between around 60cm and 90cm, with floor-standing versions typically finishing between roughly 100cm and 140cm from the ground. Ranges vary by maker, so treat those as orientation rather than a rule.

Matching height to bed base height

A deep divan with a thick mattress can easily put the top of the mattress 65cm or more off the floor. A low platform frame might be half that. The same headboard behaves completely differently on each.

The working principle: you want a decent amount of board visible above the pillows when the bed is made. If the board barely clears the mattress, the pillows swallow it and the bed looks unfinished. If the board towers, the room feels top heavy unless the ceilings are high enough to carry it.

Practical guidance by situation:

• High divan, deep mattress, standard ceiling. A mid-height board is usually safest. Very tall boards can crowd the wall.
• Low frame, thin mattress. A taller board balances the proportions and stops the bed looking like it has sunk into the floor.
• Period room with high ceilings. Taller boards look right and fill the wall. A short board can look lost.
• Loft, sloped ceiling or a window behind the bed. Measure the available height at the exact point the headboard will stand, and work below the underside of any sill unless you are happy to block part of the glass.

Also check for skirting boards. A floor-standing headboard with flat legs will be pushed forward by the skirting unless the design allows for it, which tilts the board and creates a gap at the top.

Floor-standing, strutted and wall-mounted headboards

These are three genuinely different products, and they suit different beds.

Floor-standing headboards

The board extends down to the floor on its own legs and takes its stability from the bed being pushed back against it, or from fixing to the wall.

Suits: bedsteads and frames without their own headboard, and rooms where the bed sits against a flat wall.

Watch for: skirting boards, as above, and the fact that floor-standing boards do not physically attach to the bed. If the bed gets nudged out from the wall, a gap opens between mattress and board.

Strutted headboards

The board has two wooden struts on the back, each with slots or holes that bolt to the headboard fixing points on a divan base. The struts hold the board clear of the floor and let you adjust the height within a limited range.

Suits: divan bases, which almost always have two threaded bolt points at the head end.

Watch for: the bolt spacing. There is no universal standard. The strut slots on a headboard must line up with the bolt positions on your base, so the gap between fixings has to be measured rather than assumed. Some struts have long vertical slots that give several centimetres of height adjustment, which is useful when the bed base is unusually high or low.

Wall-mounted and fixed headboards

The board is hung from the wall on brackets, sitting above and behind the bed with no contact with the base at all.

Suits: low platform beds, ottoman bases where a strutted board would block the lift mechanism, and rooms where you want the board to span wider than the bed for effect.

Watch for: the wall itself. A heavy upholstered king board on a stud wall needs to be fixed into the studs or with fixings rated for the load, and a plasterboard dot and dab wall needs appropriate anchors. The mounting height also needs setting before the bed goes in, because you cannot easily adjust it afterwards.

Our headboard service covers all three fitting types, including assessing what a particular wall will safely take.

How to measure before you order

Do this before you choose a style, not after.

Step 1: Measure the bed width. Measure the base, not the mattress, across the head end. A UK king base measures 150cm. If yours reads 160cm or 180cm, you do not have a UK king and you need to order accordingly.

Step 2: Identify the fixing type. Look at the head end of the base. Two bolt holes or threaded inserts means strutted. No fixings at all means floor-standing or wall-mounted.

Step 3: Measure the bolt gap. If there are fixings, measure centre to centre between the two holes. Write the number down. This is the figure that determines whether a strutted board will physically attach.

Step 4: Measure from floor to top of mattress. Make the bed up normally first, so the mattress is compressed as it will be in use. This tells you how much of the board will be hidden.

Step 5: Measure the available wall height. Floor to ceiling at the headboard position, floor to window sill if there is a window, floor to picture rail if there is one. Note the lowest of these.

Step 6: Measure the wall width. Particularly important between fitted wardrobes, chimney breasts or alcoves. Measure at headboard height, not at skirting level, because walls are rarely perfectly square.

Step 7: Check the skirting. Measure its depth. If you are buying floor-standing, the board needs to accommodate it.

Common sizing mistakes and how to avoid them

Assuming king means king. Covered above, but it causes more returns than everything else combined.

Measuring the mattress instead of the base. Mattresses can overhang their base slightly, particularly older ones that have spread. The base is the true reference.

Forgetting the mattress depth. People order a board based on how it looked in a showroom, where the mattress was 20cm deep, and fit it to a bed with a 30cm mattress and a topper. Ten centimetres of board disappears.

Ignoring what is behind the bed. Radiators, sockets, sloping ceilings, window reveals. All of these constrain height and depth, and none of them appear in a product listing.

Not checking the wall construction. A wall-mounted king board is heavy. The wall has to be capable of carrying it.

The straightforward way around all of this is to have someone measure in the room, with the bed in place, before anything is ordered. Our measuring service records the base width, the fixing type and spacing, the floor to mattress height, and the wall constraints at the same visit, so the specification that goes to the supplier is based on your actual bedroom rather than an assumption about what a king size ought to be.

If you would rather not take the measurements yourself, book a free measure with Boundary Carpets & Beds and we will confirm the size, the height and the fitting type that suits your bed before you commit to a style.