Every fill we make, in 20 by 36

The pillow you cannot roll off the end of.

A king pillow runs ten inches longer than a standard, and ten inches is about the distance a restless sleeper covers before an ear finds bare mattress. Same six fills, same side zipper, more room to travel.

Two Circadian pillows made up at the head of a bed with the woven tags showing
20 by 36 inches
New Jersey workshop, making pillows since 198160-night sleep trialFree shippingYou set the height

The short answer

A king pillow measures 20 by 36 inches. That is ten inches longer than a standard and six longer than a queen, and the length is what you are buying. It is the size for people who move at night and wake up with half their head on the mattress. It is also the size that makes a king or California king bed look finished, because two of them span the width. What you pay for the extra room is weight, since the fill scales with the surface. Our king holds about 38 percent more than our standard, so a king buckwheat pillow weighs 15 pounds where the standard weighs 10.

Dimensions
20 by 36 inches, ten inches longer than a standard
Who it suits
Sleepers who move, and anyone who reads sitting up in bed
Across a bed
Two kings span 72 inches, on a mattress that is 76 inches wide
Weight
From 3.8 pounds in kapok up to 15 pounds in buckwheat
Pillowcase
Takes a king case at 20 by 36. A standard case will not reach
Height
Side zipper, arrives full, take fill out until your head sits level

Six fills, every one of them in king.

Size decides how much room you have to move. Fill decides how the pillow holds you while you do it, and that is still the harder choice.

A Circadian Buckwheat Pillow on a live-edge wood table with its end unzipped and buckwheat hulls spilling out, with seals: rated Best by The Clean List, and handmade in the USA from USA-grown buckwheat.
Holds across the length

Buckwheat Pillow

Hulls wedge against each other and stop, so a long pillow does not sag in the middle the way a soft fill does at 36 inches. It is also the heaviest king we make at 15 pounds, which you notice when you strip the bed.

Best for side and back sleepers who move and want the steadiest hold

From $89.00
A Circadian Buckwool Hybrid Pillow lies on a red daybed in morning sun, unzipped so you can see wool in one chamber and buckwheat hulls in the other, with a few hulls spilled on the cover. The seals read Rated Best by The Clean List, and Handmade in the USA from USA buckwheat and New Zealand wool.
Firm side, soft side

Buckwool Hybrid Pillow

A buckwheat chamber and an organic wool chamber sharing one 36 inch cover, split by an internal cotton divider. Turn it over for the night you are having.

Best for the buckwheat hold across a king, with a softer face on the second side

From $99.00
A Circadian Organic Wool Pillow on a teal blanket in morning sun, its end unzipped to show soft layers of wool batting inside, with The Good Trade seal (best wool pillow, best for allergy-resistant wool) and the GOTS label: Organic, certified by OTCO, GOTS-10229.
Length without the weight

Organic Wool Pillow

Crimped wool holds a king shape at 4.3 pounds, and it moves moisture out of the pillow all night, which matters more over a bigger surface because there is more of it against your face.

Best for warm sleepers who want the long pillow but not a heavy one

From $99.00
A Circadian Organic Cotton Pillow on a live-edge wood table with its end unzipped and cotton spilling out, with The Good Trade seal, Top 5 organic pillows, and the Global Organic Textile Standard (GOTS) label: Organic, certified by OTCO, GOTS-10229.
The dense one

Organic Cotton Pillow

Our densest natural fill, so a king holds a flat, even plane from one end to the other instead of a hill in the middle. It is the one most people mean when they say they want a proper pillow.

Best for back sleepers, and anyone replacing a king foam pillow

From $89.00
A Circadian Tree-Tapped Latex Pillow on a bed with its zipper open and soft, airy pieces of latex spilling out, with seals: rated Best by The Clean List, and handmade in the USA.
Springs back

Tree-Tapped Latex Pillow

Shredded slow-pour Dunlop pushes back rather than settling, so it stays put when you prop it against a headboard and read. At 6.8 pounds a king latex is middleweight.

Best for reading in bed, and sleepers who want bounce rather than sink

From $89.00
Our Wild-Harvested Kapok Pillow on a green linen bed. Soft, fluffy kapok spills from the open zipper.
The lightest king

Wild-Harvested Kapok Pillow

A hollow plant fiber that feels close to down and weighs 3.8 pounds in king. If a king buckwheat sounds like more pillow than you want to lift, this is the other end of the range.

Best for anyone who wants a soft, light king they can punch into shape

From $79.00

A standard pillow is 26 inches, and nobody sleeps inside a 26 inch box.

People who buy a king pillow are usually not chasing luxury. They are solving a specific irritation, which is arriving at morning with one ear on the pillow and the other on the sheet.

1

You start in the middle

Head centered, neck level, everything where you left it when you turned the light off.

2

You turn over

Changing position through the night is normal and mostly happens without waking you. It is how your body keeps a shoulder or hip from taking eight hours of pressure.

3

Every turn moves you a few inches

A turn is rarely a clean pivot on the spot. You travel a little each time, and the travel only goes one way for most people.

4

By morning you are off the end

Half your head is on the pillow and half is on the mattress, so your neck spends the last hours of the night bent across an edge.

The extra ten inches does not stop you moving. It means the moving happens on the pillow instead of off it, which is why people who switch to king rarely switch back.

Two Circadian pillows with woven brand tags resting on a bed dressed in organic cotton

The surface grows faster than the number suggests.

A standard pillow gives you 520 square inches to land on. A king gives you 720. The length reads as a 38 percent jump on paper, and it feels like more than that at three in the morning, because the part you gain is at the ends, which is exactly where you run out.

It also changes what a made bed looks like. A standard pillow sits well inside the width of a king mattress, so two of them read as a gap with something at each side. Two kings close it.

720square inches, against 520 in a standard
38%more surface under your head
A Circadian pillow on a bed with the side zipper open, showing the adjustable natural fill inside

Fill scales with the pillow, and so does what you lift.

Nobody warns you about this and it is the one thing people write to us about after a king arrives. A pillow this size holds more of whatever is inside it, so the weight climbs with the fill you chose. In buckwheat that means 15 pounds against 10 for a standard. In kapok it means 3.8 pounds against 2.3.

None of that is a problem while you are asleep, because the pillow is under your head rather than in your hands. It shows up when you change the bed. If you make the bed every morning and you know you will resent a heavy pillow, choose kapok or wool and you will still get the length.

15 lba king in buckwheat, our heaviest
3.8 lba king in kapok, our lightest
Two pillows in organic cotton pillowcases at the head of a made bed

A king pillow needs a king case, and most people find that out late.

The case you own will not stretch ten inches. A king pillowcase is cut to 20 by 36, and forcing a king pillow into a standard case compresses the ends, which undoes the reason you bought the size. We sell cases in king in the same organic cotton sateen as the sheets.

The protector comes in king too, and it is worth more on a big pillow than a small one. There is more fill in there to keep clean, and skin oil and moisture are what shorten the life of a natural fill.

72 intwo king pillows across a bed
76 inthe width of a king mattress

King against standard, in the numbers that decide it.

Both sizes are 20 inches deep and take the same six fills. Everything that differs comes from the extra ten inches of length.

Circadian king and standard pillow specifications, 2026.
What changes King, 20 by 36 Standard, 20 by 26
Length 36 inches 26 inches
Surface under your head 720 square inches 520 square inches
Two of them across a bed 72 inches, which suits a king or California king 52 inches, which leaves a king bed looking bare at the sides
Room before you run out Five inches spare at each end for a turn You can be half off it by morning
Weight in buckwheat 15 pounds 10 pounds
Weight in kapok 3.8 pounds 2.3 pounds
Pillowcase it takes King case, cut to 20 by 36 Standard case, sold as a pair
Setting the height Side zipper, and more fill to take out Side zipper, over a smaller range

Whether king is your size.

You wake up with your head off the end.

Take the length, and take a firm fill with it. A firm fill holds its shape across all 36 inches, where a soft one can dip in the middle once you have slept on it a while. Buckwheat is the firmest we make.

Buckwheat Pillow ›

You have a king bed and two standard pillows on it.

Two kings span 72 inches of a 76 inch mattress, which is the width the bed was designed around. Cotton is the easiest one to live with at that size because it holds an even plane end to end.

Organic Cotton Pillow ›

You want the room but not the weight.

Kapok is 3.8 pounds in king and wool is 4.3. Both give you the whole 36 inches without the heft of a hull fill, and wool moves moisture out of the pillow while you sleep.

Organic Wool Pillow ›

You sit up against the headboard to read.

Shredded latex pushes back instead of flattening, so a king stays propped rather than folding down behind your shoulders after ten minutes.

Tree-Tapped Latex Pillow ›

King size, answered.

What are the dimensions of a king size pillow?

20 by 36 inches. That is the standard American king pillow size and it is what ours measure. A standard pillow is 20 by 26 and a queen is 20 by 30, so all three are the same depth and differ only in length.

Is a king size pillow too big for a queen bed?

Two king pillows measure 72 inches across and a queen mattress is 60 inches wide, so they will hang over the sides by about six inches each. Plenty of people do it anyway and like how it looks. If you want the pillows to sit inside the width of a queen bed, two queen pillows come to exactly 60 inches.

Do king pillows need king pillowcases?

Yes. A king case is cut to 20 by 36 and a standard case is 20 by 26, so a standard case will not reach. Forcing it on squeezes the ends of the pillow flat, which cancels out the length you paid for. Ours come in king in the same organic cotton sateen as the sheets.

How many king pillows fit on a king bed?

Two, with room to spare. A king mattress is 76 inches wide and two king pillows come to 72, so you get about two inches of clearance at each side. On a California king, which is 72 inches wide, two king pillows fill the width exactly.

Are king size pillows good for side sleepers?

They suit side sleepers who move. Sleeping on your side puts the widest gap between your ear and the mattress, so the height and firmness of the fill matter more than the size does. What the extra length adds is somewhere to land when you turn over, which is the moment side sleepers usually end up at the edge.

Do king pillows have more loft than standard pillows?

No. Size and height are separate. A king is longer, not taller, and both sizes arrive full so you can take fill out through the side zipper until your head sits level with your spine. A king does hold more fill, which means you have a wider range to set it across.

Which pillow fill is best in a king size?

It depends on what you are solving. Buckwheat holds the firmest, steadiest line across the length and suits neck pain. Cotton gives you a dense, even plane end to end. Wool and kapok keep the weight down. Latex springs back if you read sitting up. Every one of our six fills is made in king.

How much does a king size buckwheat pillow weigh?

About 15 pounds, against 10 pounds for the same pillow in standard. Buckwheat hulls are dense, and a king holds 38 percent more of them. It is a real consideration if you make your bed every morning, and it is the reason we point some people at wool or kapok instead.

What is the difference between a king and a queen pillow?

Six inches of length. A queen is 20 by 30 and a king is 20 by 36. Two queens measure 60 inches across, which matches a queen mattress exactly. Two kings measure 72 inches, which is built for a king or California king bed.

Do you make a king size pillow protector?

Yes, cut to 20 by 36 to match the pillow. It zips all the way around and goes on under the pillowcase. On a king it earns its keep more than on a smaller pillow, because there is more fill inside to keep away from skin oil and moisture.

Sixty nights to find out whether you still reach the edge.

Every pillow we make opens at the side, so if a king turns out to hold more under your head than you want, take some fill out and set it where you like it. Free shipping. Handmade in our New Jersey workshop.

See the king pillows

The pillow people keep.

If you've sent more pillows back than you've kept, you're our customer.

4.8 out of 5
5★ 178
4★ 14
3★ 9
2★ 2
1★ 0
Read all 203 reviews

The three-star ones are in there too.

“I have owned more pillows than I have owned houses and I have owned 12 houses.”  This is by far the only pillow to use if you don’t want to wake up with sore shoulders or neck. I have replaced all the pillows in my house with this pillow.
Louise · Tree-Tapped Latex Pillow · August 2026 · Verified buyer
I have compressed discs in my neck, and I have spent hundreds of dollars over the past 6 months trying to find one that will help me sleep. Every pillow I bought caused me to wake up in even more pain than the night before!! The buckwheat pillow is life-changing!! I have slept through the night and wake up with no pain!!
Verified Patty Buckwheat Pillow · August 2026
I was leery to try another expensive pillow without some sort of trial period after being very let down by a different company's natural fiber pillow… I don't hear anything at all with the buckwheat! It does stay fresh and cool as well, but most importantly it actually holds my head/neck up and in place. Which allows me to actually get rest instead of always adjusting.
Verified Morgan Buckwheat Pillow · August 2026
I've been a buckwheat pillow customer for the last 7 years and I can say that Circadian has the highest standards of quality paired with incredible customer service. Very very impressed and would not hesitate to send anyone their way.
Verified Taylor Buckwheat Pillow · August 2026
I have spent years searching for a pillow that feels supportive and comfortable all night. I have finally found it. I absolutely love the Buckwool pillow. I removed a bit of the material to get it to exactly how I want it… I rarely wake up with neck pain now.
Verified Anonymous Buckwool Hybrid Pillow · August 2026
I find myself switching between the two and loving the feel of both. I haven't woken up with a sweaty head with either and that's an amazing feeling especially in the AZ summer. The buckwheat side is a lot quieter and more comfy/soft than others I've tried in the past.
Verified Ashley Buckwool Hybrid Pillow · August 2026
I have tried at least 10 different pillows in the last 3 years. Nothing has worked out except for this wool pillow. I have chronic neck pain which has been greatly reduced. I am very happy with my new pillow.
Verified Anonymous Organic Wool Pillow · August 2026
I have pretty bad chemical sensitivity (housebound most of the time)… I try to only buy totally safe, non-toxic products. I found this pillow to be very safe and non-toxic, and the packaging was fragrance free which is always a huge plus.
Verified Janie Wild-Harvested Kapok Pillow · August 2026
I ordered this pillow to replace my very old (but beloved) down pillow and I'm so glad I did. It is heavenly!… I advise you to heed the recommendation given by the quiz. I ordered cotton initially despite the quiz giving me kapok as a result… the quiz was right.
Verified Hannah Wild-Harvested Kapok Pillow · September 2026
The quality craftsmanship and materials is evident… when I asked if extra stuffing were available for the second one I'm using as a knee pillow, they not only pointed me to the right place on their site, but also created a new, smaller 1-lb. refill size based on my request.
Verified Stephanie Organic Wool Pillow · September 2026