Pregnancy side sleeping and pillow height — what actually changes

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

Side sleeping becomes the default for many people during pregnancy, and it changes what a pillow needs to do. The question is not "which pillow is for pregnancy" in the abstract. It is: what height and shape support your head, neck, and shoulders in the position you actually sleep in, as your body changes?

The mechanics are straightforward. When you lie on your side, the gap between your head and the mattress is roughly the width of your shoulder. A pillow that is too low lets your head drop toward the mattress. A pillow that is too high pushes your head up and bends your neck the other way. The right height fills that gap without forcing your neck up or down, and it changes as your shoulders, hips, and sleeping position change — which is why a fixed-height pillow that felt right early on can feel wrong later.

That is also why a single "pregnancy pillow" shape does not solve the height question on its own. A long body pillow can support your knees and belly, and many people find that comfortable, but it does not automatically give your head the right height. You still need a head pillow at the right loft for your shoulder width, and you may need to change it as you go.

A useful way to think about it is in layers, not in one purchase. Start by measuring your shoulder width — straight across your upper back, shoulder point to shoulder point — and use that to estimate your head-pillow height. Then add support where you actually need it: between the knees, under the belly, or behind the back, depending on what feels unsupported that week. Revisit the height every few weeks, because the answer in the second trimester may not be the answer in the third.

If you buy a customisable pillow, the practical advantage is restacking: you can add or remove a layer at home when the height stops feeling right, instead of buying a new pillow each time. Try a build for 5–7 nights before judging it, and change one layer at a time, so you know which change made the difference.

One caution: this guide is about comfort and pillow height, not about medical advice for pregnancy. Sleep position, pain, swelling, or any new symptom during pregnancy should be raised with your doctor or midwife, not solved by a pillow purchase. A pillow can make side sleeping more comfortable. It cannot replace clinical advice.

This guide is general information about pillow height and comfort, not medical advice for pregnancy or any health condition.

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.