UK pillow sizes
A UK standard pillow is 50 by 75 centimetres. Getting the size right matters far less than getting the height right.
The short answer
A UK standard pillow is 50 by 75 centimetres, roughly 20 by 30 inches. Almost all UK pillowcases are cut for it.
Continental and US pillows are different sizes and their cases do not fit.
| Name | Size | Note |
|---|---|---|
| UK standard | 50 × 75cm | The default. Cases widely stocked. |
| Continental / European square | 65 × 65cm | Mostly decorative in UK bedrooms |
| US standard | 51 × 66cm | Shorter. UK cases are loose on it. |
| US king | 51 × 92cm | Long. Needs its own cases. |
| Bolster | Varies | Cases are specialist |
| Body pillow | Typically 140 × 50cm | Cases sold with the pillow |
Measure your pillow before buying cases, and buy the case to the pillow rather than to the bed size. A case that is too large lets the pillow move inside it, which bunches the fabric under your head.
Height is the specification that matters
Size is about cases. Height, or loft, is what decides whether a pillow works, and it is the most commonly wrong thing in a British bedroom.
A pillow fills the gap between your head and the mattress, and that gap is created by your shoulder. So the height you need depends on your shoulder width and your sleeping position, not on the size of the pillow.
| Position | Height needed |
|---|---|
| Side | The most of any position. Broad shoulders need more again. |
| Back | Medium. Fill the hollow without pushing the head forward. |
| Front | Almost none. Any height extends an already-rotated neck. |
| Combination | Slightly above back-sleeping height. Adjustable beats fixed. |
The test: lie in the position you actually sleep in for ten minutes so the pillow settles, then have someone look at you from behind. Your neck should be a straight continuation of your spine.
Two signals that beat any measurement
Both are involuntary, which is what makes them reliable.
An arm habitually under your pillow means it is too low. You are adding height in your sleep.
Waking having pushed the pillow aside means it is too high.
And the morning symptoms: ache at the back of the neck means too high, chin tucked toward the chest all night. Ache at the front of the neck or jaw means too low, the head dropped back.
Your mattress changes the answer
This catches everyone who buys a new bed and cannot work out why their neck hurts.
A softer mattress lets your shoulder sink further, which reduces the gap between your head and the mattress, so you need less pillow height.
So a pillow that suited you for years can be wrong the week a new mattress arrives, and the same applies after fitting a topper.
Re-run the ten minute test whenever the surface changes, and expect the answer to move.
How many, and when to replace
One pillow at the right height beats two at the wrong height. Stacking two is the commonest self-inflicted cause of upper back and neck tension, because it pushes the head forward and holds it there.
The exception is a guest room, where two medium pillows per person is the correct answer, because you cannot know a guest's shoulder width or sleeping position. A side sleeper stacks them, a back sleeper uses one, a front sleeper pushes both aside. That is the hotel solution and it works.
The replacement test: fold the pillow in half and let go. If it springs back it still has structure. If it stays folded, it is finished.
Rough lifespans: synthetic one to two years, foam two to three, down two to four, micro-spring three to four, latex four and up. Foam fails invisibly, losing height while looking identical, which is the most common cause of neck pain appearing with no obvious trigger.
Related reading
Choose a pillow
Cases and protectors
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Questions people ask
What size is a UK pillow?
Fifty by 75 centimetres, roughly 20 by 30 inches, and almost all UK pillowcases are cut for it. Continental square pillows are 65 by 65 and US standard pillows are 51 by 66, and neither takes a UK case properly.
What pillow height do I need?
It depends on your shoulder width and sleeping position, because a pillow fills the gap your shoulder creates. Side sleepers need the most height, back sleepers medium, front sleepers almost none.
How do I know if my pillow is the wrong height?
Two involuntary signals: an arm habitually under the pillow means too low, and waking having pushed it aside means too high. Ache at the back of the neck means too high; ache at the front of the neck or jaw means too low.
Should I use one pillow or two?
One at the right height beats two at the wrong height. Stacking two is the commonest self-inflicted cause of upper back and neck tension. The exception is a guest room, where two medium pillows per person covers more people.
When should I replace a pillow?
Fold it in half and let go: if it stays folded it is finished. Synthetic lasts one to two years, foam two to three, down two to four, latex four and up.