What Is the Best Pillow? Why Fit Matters More Than Brand
The best pillow is the one whose height fits your body, your sleeping position and your mattress. No single pillow is best for everyone, because shoulder width and neck size differ from person to person.
Key takeaways
- Height is the first question we ask about any pillow. Fill and cover come second.
- In a pilot EMG study of 15 adults, a pillow height matched to shoulder width produced the lowest neck and shoulder muscle activity during side sleeping (Jiao et al., 2025).
- Pillowise picks one of 7 sizes from three measurements, your sleeping position and your mattress firmness. The measurement is free at a provider near you.
Why is there no single best pillow?
A pillow fills the gap between your head and the mattress. That gap is wider for a side sleeper with broad shoulders than for a back sleeper with a slim frame. A pillow that is too high or too low leaves the neck tilted for hours. A ranking of pillows can compare fill and price, but it cannot know your shoulders. A pillow should fit like a shoe size, and one stock height cannot suit everyone.
What should you look for in a pillow?
- Sleeping position. Side, back and stomach sleepers need different heights. Use the position in which you fall asleep.
- Mattress firmness. Soft, medium and firm mattresses, including memory foam and hybrid, change how far your body sinks and so the gap the pillow must fill.
- Body size. Shoulder width, neck circumference and neck height all play a part.
For a full walk-through, read how to choose a pillow based on sleep position and mattress. To check the pillow you own now, see how to tell if your pillow is the wrong height. For another take on fit, see Sleep Easy Pillow: What to Look for in a Pillow That Fits.
What does the research show, and what does it not?
The Jiao et al. (2025) study is small and tested healthy adults. It does not show that a matched pillow treats neck pain or stiffness, and it shows an association with muscle activity, not a cause. If you wake up in pain often, see your own chiropractor, physical therapist or doctor. A pillow will not fix every cause. More on the evidence: adjusting pillow height for neck pain: clinical studies.
How does Pillowise approach it?
The Pillowise algorithm combines shoulder width, neck circumference, neck height, sleeping position and mattress firmness. It indicates the right size for about 95% of people. Weight is not part of it, so your provider checks your position on the pillow and adjusts if needed. The standard pillow measures 22 x 14 in and has a 100% memory foam core made in the Netherlands. The cover is removable and machine washable at 104°F. The suggested retail price for a standard pillow is $159, and providers set their own final price. Give the pillow 7 to 10 days to adjust. Within 30 days of purchase you can exchange it for another size or return it for a refund. You pay return shipping.
You can try the pillow height calculator first, or see the Pillowise pillows. Here is what happens in a pillow fitting.
Find a provider near you
Pillowise is sold only through licensed chiropractors, physical therapists and massage therapists, not in stores or on Amazon. Find one near you and book a free measurement. Ask your plan administrator whether FSA or HSA funds can be used.
Find a Pillowise provider near you for a free measurement
Are you a chiropractor, PT or LMT? Register as a Pillowise reseller.
Thijs van der Hilst, physiotherapist
Co-founder of Pillowise
