A pillow has one job: to fill the gap between your head and the mattress so your neck stays in line with your spine. How big that gap is depends almost entirely on which way you sleep, which is why the same pillow can be excellent for one person and useless for the person beside them.
A side sleeper has the widest gap to fill, because the shoulder holds the head furthest from the mattress. A back sleeper needs less. Someone who sleeps face-down needs almost nothing, and a thick pillow will push their neck backwards all night.
The picks below are separated on that basis. Everything was checked against the retailers on 22 September 2026.
1. Herington High & Firm Side Sleeper Pillow
Built for the one position that needs the most height, at around $53. It is rated 4.7 by Temple & Webster owners, made in Australia, with a cotton cover and a firm fill that holds its shape rather than compressing under the weight of a head on its side.
Firmness matters as much as height here. A high pillow that collapses by morning leaves a side sleeper in the same position as a flat one, and the reviews that mention it are about it staying up.
What We Like:
- Around $53
- Holds its height overnight
- Australian made
- Cotton cover, hypo-allergenic
What We Don't Like:
- Too high for anyone who also sleeps on their back
2. Temple & Webster Memory Foam Standard Pillow
The highest-rated pillow here and the cheapest, at around $50. Temple & Webster owners rate it 4.8, from more than 90 reviews.
It is a solid block of memory foam rather than a fill, so it does not need plumping and does not develop a hollow. The listing's own headline feature is pincore ventilation, which is the honest tell: heat is the trade-off memory foam carries, and the holes are there to manage it. Medium to firm, and it suits side and back sleepers rather than face-down ones.
What We Like:
- Around $50
- Keeps its shape without plumping
- Ventilated through the core
What We Don't Like:
- Memory foam holds more heat than a feather fill
3. Downia Soft Side Up Duck Down & Feather Pillow
The one here for people who sleep face-down or very close to it, at around $127. Down and feather compresses further under the head than foam does, which is the point: it gets out of the way. Rated 4.6 at Temple & Webster from more than 50 reviews, machine washable, with a cotton cover.
The same property rules it out for side sleepers, who will find it flattens to nothing by the middle of the night.
What We Like:
- Compresses low, which suits face-down sleeping
- Machine washable
- Cotton cover
What We Don't Like:
- Flattens too far under a side sleeper
4. Koala Pillow
The only pillow here sold with a long trial. Koala rate it 4.6, from more than 6,000 owners, and it comes with a 120-day trial, so a pillow that turns out to be wrong for how you sleep can go back.
The firmness adjusts rather than the height: zip both sides for firmer, unzip for softer, or run one of each. The pillow itself is 14cm tall and stays that way, which puts it in side-and-back-sleeper territory regardless of how it is zipped. It costs around $155.
What We Like:
- 120 day trial
- Firmness changes with a zip
- Reversible for the season
What We Don't Like:
- The 14cm height is fixed, so it cannot be dropped for face-down sleeping
5. Ecosa Pillow
The one that adjusts the measurement that actually matters. It ships with three removable memory foam pads, two of 2cm and one of 3cm, so the height can be set anywhere across a 7cm range and changed again if you switch positions. Rated 4.7 on Ecosa's own site, with a 100-night trial.
That makes it the sensible choice for anyone who does not already know what height suits them, or who sleeps on their side some nights and their back on others. It sits around $190, dropping for members.
What We Like:
- Height adjusts across three removable pads
- 100 night trial
- Tencel and recycled yarn cover
What We Don't Like:
- Nearly four times the price of the memory foam pillow above
6. Emma Diamond Pillow
The most configurable and the most expensive, starting around $269. Emma count seven ways to set it up, by flipping it or removing layers, which changes both the height and the firmness rather than one or the other.
It suits a household where the same pillow has to work for two people with different preferences, since the configuration can be changed without buying anything else. We have looked at it on its own in our Emma Diamond pillow review.
What We Like:
- Height and firmness both adjust
- Seven configurations from one pillow
- Memory foam with a cooling top layer
What We Don't Like:
- The most expensive pillow here by a clear margin
The measurement that matters is loft
Loft is how tall the pillow sits under load, and it is the specification that decides whether a pillow works for you. Side sleepers need the most, back sleepers less, front sleepers least.
The problem is that it is rarely the figure on the listing. Listings lead with "medium", "firm" or "high", and those words are set by each brand against its own range rather than against anything shared. The same is true one shelf over: mattress brands cannot agree which direction a firmness scale even runs, which we set out in how the brands rate mattress firmness.
Position labels on listings are applied loosely too. While checking these, one pillow named for back sleepers carried a "stomach sleeper" tag in the same listing's own specifications. Where a height in centimetres is published, it is worth more than the label beside it.
What "adjustable" means varies
Three of the pillows here are sold as adjustable, and they adjust different things.
Koala's changes firmness, through zips, while the height stays at 14cm. Ecosa's changes height, through pads that come out. Emma's changes both. For someone who already knows they need a lower or higher pillow, only the second and third are any use, and the distinction is easy to miss because all three use the same word.
Where a trial is worth paying for
A pillow is harder to judge in a shop than a mattress, and most of them cannot be returned once the packaging is open, for hygiene reasons.
Of the six here, the Koala carries a 120-day trial and the Ecosa a 100-night one. Both are brands that sell mattresses, which is why the terms look like mattress terms. The Temple & Webster pillows are covered by ordinary change-of-mind returns instead, which is a shorter window and generally requires the item unused.
Anyone who already knows what height suits them is paying a premium for cover they will not use. Anyone guessing is buying the ability to get it wrong once without being stuck with it.
Once the pillow is sorted, the layers underneath it are covered in mattress toppers and mattress protectors.
