What is the best pillow for side sleepers?
If you're a side sleeper, your pillow needs are quite specific. When your head hits that pillow each night, you need something with enough height and firmness to keep your spine properly aligned from head to hips. Too flat, and your neck drops down at an angle; too high, and you're forcing your head upward – both recipes for morning misery!
As Verity Kick, Marketing Director at Oak Tree Mobility, explains: "For side sleepers, it's important to choose a pillow that strikes the right balance between support and comfort to keep your spine aligned properly. A pillow with a medium to high loft (height) is ideal. This is because it helps fill the space between the head and shoulder, ensuring the neck stays straight and reduces strain on the spine."
Nils Stene, CEO of Norvegr, confirms this approach: "If you sleep solely on your side, we recommend a firm pillow if you want to use one pillow. Sleepers need a higher pillow to support the head, neck and align the spine."
Emily and Jonathan Attwood, founders of scooms, add: "Side sleepers often need a firmer, higher-loft pillow to maintain neck alignment, whilst stomach sleepers may benefit more from a softer, thinner pillow."
Material-wise, memory foam gives you excellent support, while latex offers similar benefits with more bounce. Traditional down or feather pillows can work well if they're firm enough but might need more regular plumping.
The right pillow should keep your head, neck and spine in a straight horizontal line – like an extension of your mattress. Your shoulders should sink into the mattress while your pillow supports your head at the perfect height.
UK health guidance for neck pain often recommends using a low, firm pillow that keeps your head in line with your spine, rather than stacked pillows that push your neck out of position. If you’re waking up sore, try removing any extra pillows and switching to a single, supportive pillow designed for side sleepers to see if your symptoms improve.
What is the best height for a side sleeper pillow?
The magic number most sleep experts recommend is between 10 to 15cm (that's about four to six inches), but here's the thing: it really depends on your shoulder width.
Dr. Mahwish Dildar Abbasi, a dermatologist and aesthetics professional, confirms: "Side sleepers need more loft than back sleepers because the acromion creates a wider space. Most patients feel balanced with 10 to 12 cm of height in medium firmness latex or shredded memory foam that can be fluffed to fill that gap without tipping the head forward."
The golden rule is that your pillow should completely fill the gap between your ear and your mattress. Too low, and you'll get that horrible neck droop; too high, and you're forcing your neck upward at an awkward angle.
Stene emphasises that "height is the key factor" for side sleepers, although he notes that this "looks different to everyone" based on body type. Kick adds that the ideal pillow height "helps fill the space between the head and shoulder, ensuring the neck stays straight and reduces strain on the spine."
Broader-shouldered folks generally need something closer to the 15cm mark, while more petite sleepers might find 10cm just right. The perfect height keeps your spine in a lovely straight line from the tailbone to the crown.
Adjustable pillows are absolutely brilliant for side sleepers – you can add or remove filling until you hit that sweet spot where your neck feels perfectly supported without any pressure points. Your shoulders should sink into the mattress while your head stays perfectly aligned.
How long should a pillow last?
As a rough guide, most experts suggest replacing your pillow every one to two years, or sooner if it’s gone lumpy or no longer springs back when you squeeze it. That way, you keep the loft you need for good alignment instead of slowly sinking into a tired, flat pillow.
Are memory foam pillows good for side sleepers?
The beauty of memory foam for side sleepers is how it creates that perfect support between shoulder and ear – it literally moulds to your head and neck, keeping your spine properly aligned instead of dropping at an awkward angle.
The Attwoods explain: "Memory foam pillows are designed to contour to the shape of your head and neck for tailored support. Ideal for those who prioritise spine alignment and pressure relief, they can be good for those who suffer from neck and back issues."
Andreea Costina, CEO of Achillea Beauty, offers a more technical perspective: "A pillow works well when its internal structure rebounds quickly yet yields just enough to cradle the skull. For that balance, I lean toward moulded latex or blended kapok and shredded memory-foam fill."
They can feel a bit brick-like initially, but give it a week to adjust. The firmer feel is exactly what side sleepers need to maintain that all-important height. Dr. Abbasi recommends "10 to 12 cm of height in medium firmness latex or shredded memory foam" as the sweet spot for most side sleepers.
Memory foam does retain heat more than natural options, so if you're a hot sleeper, look for ones with cooling gel or bamboo covers. And yes, they're pricier than supermarket options.