The right pillow keeps your neck aligned with your spine while you sleep, and the best choice depends on how you lie. This pillow buying guide matches loft and firmness to side, back and stomach sleepers: side sleepers need a high, firm pillow, back sleepers a medium one, and stomach sleepers a low, soft pillow that stops the neck arching backward.
Why your sleeping position decides the pillow
Your pillow has one job: fill the gap between your head and the mattress so your neck stays level with the rest of your spine. Get that gap wrong and you wake with a stiff neck, sore shoulders or a dull headache.
The size of that gap changes completely depending on how you lie. That is why the same pillow can feel perfect for one person and awful for another. Before you look at fill or fabric, work out your position.
What are pillow loft and firmness?
Loft is the height of the pillow when your head rests on it. Firmness is how much it resists being squashed. The two work together, because a firm pillow holds its loft while a soft one collapses under weight.
Most quality pillows fall into low (under 8cm), medium (8-12cm) and high (over 12cm) loft. Match the loft to the width of your shoulders and your mattress feel, then fine-tune with firmness.
How firmness and your mattress work together
A soft mattress lets your shoulder sink in, which shrinks the gap and calls for a slightly lower pillow. A firm mattress keeps your shoulder up, so you need more loft to fill the larger gap. Always judge a pillow on the bed you actually sleep on.
What about pillow size?
Standard, king and European pillows differ in length, not just look. A standard pillow suits most single beds and slimmer frames, while a king pillow spans a wider bed and gives restless sleepers more room to move.
European (square) pillows are mainly for propping up against the bedhead, not for sleeping on. Buy the size that matches your bed and your pillowcases, then focus on loft and firmness for actual comfort.
Best pillow for side sleepers
Side sleepers have the widest gap to fill, from the mattress up to the ear, roughly the width of one shoulder. You want a high-loft, firm pillow that holds its shape all night and does not let your head drop.
Look for firm memory foam, a tall latex pillow or a well-stuffed down-alternative you can pack out. If your chin tucks toward your chest, the pillow sits too high; if your head tips down toward the mattress, it is too low.
Side sleepers often benefit from a second pillow between the knees, which keeps the hips level and takes strain off the lower back. If you sleep with a wider frame or broad shoulders, lean toward the higher end of the loft range so your head never sags.
Best pillow for back sleepers
Back sleepers need a medium loft and medium firmness. The pillow should cradle the natural curve of your neck without pushing your head forward and off the mattress.
Contoured memory foam suits many back sleepers because the raised edge supports the neck while the dip holds the head. A medium down-alternative works well too. If you can slide your hand easily into a large gap under your neck, add a little loft.
A common mistake is choosing a pillow so tall it forces the chin toward the chest, which can restrict breathing and strain the neck. Back sleepers who snore may find a slightly firmer, well-supported pillow keeps the airway more open through the night.
Best pillow for stomach sleepers
Stomach sleeping is the hardest position on your neck, because your head is turned to one side for hours. The fix is a very low, soft pillow, or in some cases no pillow at all under the head.
A soft, thin down-alternative or a flat, squashable pillow keeps your neck from arching backward. Many stomach sleepers also tuck a slim pillow under the hips to ease lower-back strain. Whichever fill you pick, guard the mattress underneath with a fitted layer like this Australian-made cotton quilted mattress protector.
Which pillow fill should you choose?
Fill decides how the pillow feels, how long it lasts and how easy it is to care for. Here is how the common options compare so you can pick the one that suits your position and budget.
| Fill type | Feel and support | Best for | Care notes |
|---|---|---|---|
| Memory foam | Firm, contouring, holds loft | Side and back sleepers | Spot clean; do not machine wash the core |
| Latex | Firm, springy, breathable | Side sleepers, hot sleepers | Wipe down; long lasting |
| Down and feather | Soft, mouldable, luxurious | Back and stomach sleepers | Often dry clean; fluff daily |
| Down-alternative (microfibre) | Soft to medium, adjustable | All positions, allergy-prone | Usually machine washable |
| Wool | Medium, breathable, temperature-regulating | Hot or sweaty sleepers | Air regularly; follow the label |
If you sleep hot, breathable natural fibres make a real difference. Wool manages moisture and temperature well, which is why a warm Australian-made merino wool quilt pairs so nicely with a wool-fill pillow through a cold Australian winter.
Should combination sleepers pick differently?
Plenty of us switch positions through the night. If you move between side and back, choose a medium-high adjustable pillow so you can add or remove fill to suit whichever way you land.
Down-alternative pillows with a zip are ideal here, because you control the loft yourself. Avoid a very high firm pillow if you ever roll onto your stomach, as it will crank your neck out of line.
Mistakes to avoid when buying a pillow
A few common errors send people home with the wrong pillow. Steering clear of them saves both money and a lot of restless nights.
- Buying on softness alone — a pillow that feels lovely in the shop can leave your neck unsupported all night.
- Ignoring your position — the single biggest factor, yet the one most shoppers skip.
- Forgetting your mattress — a new pillow behaves differently on a soft bed than a firm one.
- Keeping a flat old pillow "to save money" — a collapsed pillow undoes the support of even a great mattress.
- Overlooking allergies — down can trigger reactions, so choose a washable down-alternative if you are sensitive.
Take a minute to picture how you actually fall asleep, and let that guide the loft and firmness rather than first impressions in-store.
How to look after your pillow
Even the best pillow needs support from the layers around it. A pillow protector under the case guards against sweat, oils and dust mites, and keeps the fill fresher for longer.
Air your pillow in the sun every few weeks, wash covers regularly, and replace pillows once they no longer spring back after folding. Explore matching quilts, protectors and sheet sets in our bedding range, and browse toppers and layers across the full linens and bedding collection.
When should you replace a pillow?
Fold your pillow in half and let go. If it stays folded instead of springing back, it has lost its support and it is time to replace it. Most pillows need swapping every one to three years, depending on fill and use.
Our take
Buy for the position you spend the most time in, then use firmness and a protector to fine-tune. Side sleepers should err high and firm, back sleepers medium, and stomach sleepers as low and soft as possible.
Test a new pillow for at least a week before you judge it, because your neck needs a few nights to adjust. If neck pain lingers despite the right pillow, it is worth a chat with a physio or GP.
Frequently asked questions
What is the best pillow for side sleepers?
Side sleepers need a high-loft, firm pillow to fill the wide gap between the mattress and ear, keeping the neck level with the spine. Firm memory foam, tall latex or a well-packed down-alternative all work. If your chin drops toward your chest the pillow is too high; if your head sags, it is too low.
How often should you replace a pillow?
Most pillows need replacing every one to three years, depending on the fill and how often you use them. A quick test: fold the pillow in half and let go. If it springs back it still has support; if it stays folded, the fill has collapsed and it is time for a new one to protect your neck.
Is a firm or soft pillow better?
It depends on your sleeping position, not personal preference alone. Side sleepers need firm and high to hold the head up, back sleepers a medium feel, and stomach sleepers soft and low so the neck does not arch. Firmness should be matched to the gap your position creates, then fine-tuned to your mattress.
What pillow fill is best for allergies?
A washable down-alternative (microfibre) pillow is usually the safest choice for allergy-prone sleepers, since it can be machine washed regularly to remove dust mites and can be topped with a protector. Down and feather can trigger reactions in some people, so avoid them if you are sensitive and keep covers freshly laundered.
