Side-sleeper neck height — how to measure it without guessing

Restore guides · Comfort estimates are for guidance and do not constitute medical advice.

Most side sleepers choose a pillow by feel in a shop, or by a label that says "medium" or "high". Neither tells you whether the height matches your body. This guide gives you a measurement you can do at home in two minutes, and explains why it works.

When you lie on your side, your head needs to be supported at the same level as your spine. The gap that needs filling is the distance from the side of your head to the mattress, and for most adults that gap is close to the width of the shoulder on the side you lie on. That is why shoulder width is a useful proxy: it is easy to measure, it varies a lot between people, and it tracks the gap better than height, weight, or a generic size label.

Here is the measurement. Stand straight, or ask someone to help. Run a tape straight across your upper back, from one shoulder point to the other — the bony point at the top of each shoulder, not the edge of your arm. Write that number down in centimetres. If you do not have a tape, use a well-fitting shirt laid flat: measure seam to seam across the shoulders, straight across the back. As a rough starting point only, a regular or slim men's large is often around 48–52 cm, and an oversized large can be 55 cm or more — but your own measurement beats any size chart, because brands cut differently.

Enter that number, plus your usual sleep position and mattress feel, into a height calculator like Restore's Fit Finder. The output is a target height and a range, not a single magic number — for example, a 50 cm shoulder width often points to around 13 cm, with a range either side. That range matters, because mattress softness changes how far your shoulder sinks, and personal preference for a firmer or softer feel changes what feels right within the range.

Once you have a target, test it properly. Sleep on that height for 5–7 nights, not one night, and change only one thing at a time if you adjust. If your neck feels pushed up in the morning, the pillow is likely too high. If your head feels like it is dropping toward the mattress, it is likely too low. A customisable pillow helps here because you can add or remove a layer and retest, rather than starting over with a new pillow each time.

A final note: height is not the whole story. A pillow can be the right height and still feel wrong if the fill is too hard, too soft, or too hot for you. Height gets you into the right range. Feel, temperature, and how the pillow holds up over the week decide whether you keep it.

This guide is general information about pillow height, not medical advice for neck pain or any health condition. Persistent neck pain should be raised with a clinician.

Find your height — 2 minutes

Launch S$139 S$159 · Free shipping in Singapore · Warm Cream only at launch. Pre-order — first batch ships in December 2026. After you order, our customer service team will contact you within 1 working day to confirm your delivery date.

About Restore: Restore is a Singapore pre-order business. Its customizable pocketed spring pillow is built to your height with the Fit Finder, using spring, gel, and fibre layers, with a Tencel cover in Warm Cream.