By Jordan Bedwell, Co-Founder, Hamuq Inc
Reviewed by Nathan Nielson, Hamuq · Published July 2026 · Facts verified July 2026

Pillow loft is the height of the pillow under your head once it takes your weight, and the right number depends on your sleep position, your shoulder width and how far your mattress lets you sink. This page gives the starting ranges by position in inches and centimetres, shows what the published research actually measured, and then hands you a tape-measure method that beats any generic chart. It pairs well with our guide to choosing a mattress in Canada, because the two decisions are more closely linked than most people realise.

Pillow loft by sleep position chart

Loft requirements rise with the size of the gap between your head and the mattress, which is why side sleepers need the most and stomach sleepers the least. On your side, the pillow has to fill the whole distance from the outside of your shoulder to the side of your head. On your back, that gap is small. Face down, there is almost no gap at all, and a thick pillow forces the neck into extension.

Practical starting ranges compiled from published pillow height research and standard retail loft categories, July 2026. These are starting points for a personal fit test, not clinical recommendations. Measure loft under load, with your head on the pillow, not on an empty pillow standing on a shelf.

What the research actually found

There is no scientific consensus on a single correct pillow height, and any page that gives you one number without saying so is overstating the evidence. A 2021 review in the journal Healthcare examined the determinants of pillow height and concluded that a suggested range for optimal cervical alignment cannot yet be identified from the available evidence, and that no firm conclusions exist for either supine or side-lying positions. That is worth knowing before you spend money on a pillow marketed as clinically optimal.

What the research does show clearly is direction. A 2016 biomechanics study published in PeerJ measured cranio-cervical pressure and spinal alignment across four pillow heights and found the effects are large and height-specific.

Ren et al., 2016, PeerJ, ten healthy adults, four pillow heights. Cohort averaged 167 cm and 59.6 kg, smaller than Canadian adult averages, so the optimal heights in that study skew low relative to a larger frame. Figures rounded from the published results.

Two things follow. Going too high costs you more than going too low: raising the pillow from 110 mm to 170 mm increased average cranial pressure by roughly 30 per cent and pushed the cervical angle up by 66 per cent. And a separate 2024 study of side sleepers found that the height producing a cervical curve closest to natural standing posture was not the height sleepers rated most comfortable, which is a useful warning that comfort on night one is a poor guide.

Measure your own loft in two minutes

Your correct loft equals your shoulder gap minus how far your shoulder sinks into your mattress, and you can measure both with a tape measure and a straightedge. This is the step that turns a generic chart into your number, and it is the only method here that accounts for your own body.

Stand square against a wall and measure horizontally from the side of your neck to the outer point of your shoulder. Most adults land between 5 and 7 inches (13 to 18 cm). That is your shoulder gap. Then subtract the sink allowance for your mattress from the table below. The result is your side-sleeping loft. For back sleeping, take about 60 per cent of that figure.

Sink allowances are practical planning figures for an average-weight adult; heavier sleepers sink further on any given surface and lighter sleepers less. Measure your own by lying on your side and having someone note how far your shoulder drops below the mattress surface.

Check the result rather than trusting it. Lie on your side on your own mattress with the pillow you are testing and have someone photograph you from behind at eye level. A straight line should run from the back of your head, down the neck, along the spine. If your head tips down toward the mattress, the pillow is too low, and if your chin lifts toward the ceiling, it is too high.

Why your mattress changes the answer

A firmer mattress requires a higher pillow, because your shoulder sinks less and the gap the pillow has to fill stays larger. This is the connection almost every pillow guide leaves out, and it explains why a pillow that was perfect in your old bed can feel wrong within a week of a new mattress arriving.

The arithmetic is simple. With a 6-inch shoulder gap on a plush mattress that lets the shoulder drop 3 inches, you need roughly a 3-inch pillow. Move to a firm mattress where the shoulder drops only 1 inch, and you need roughly 5 inches. That is a two-inch swing from the mattress alone, which is larger than the difference between most brands' medium- and high-loft options.

Worth knowing if you are buying both at once: the Hamuq Original Hybrid sits at 6 out of 10, medium-firm, so it falls in the middle sink band above. The Organic Hybrid is firmer at 7.5 out of 10, which means less shoulder sink and a higher pillow requirement for the same person. If you are a side sleeper weighing those two, our guide for side sleepers covers the firmness trade-off, and the firmness by position and body weight chart covers the mattress side of the same decision.

How fill type affects loft over time

Loft printed on a label is the loft when new and unloaded, and different fills lose height differently under a head. Down compresses the most and needs regular fluffing; solid memory foam holds its shape but cannot be adjusted; shredded and microgel fills sit in between and can be redistributed by hand.

General characteristics of common pillow fills. Individual products vary; check the manufacturer's stated loft and whether the fill can be removed or redistributed.

The practical takeaway is that adjustability is worth more than a precisely stated number, because the number that suits you will change if you buy a new mattress, gain or lose weight, or shift sleeping position with age.

Signs your pillow loft is wrong

The clearest sign of a loft mismatch is waking with symptoms that fade during the day, because that pattern points to something happening while you are still rather than to your daytime activity. The table below separates the too-high pattern from the too-low one.

Comfort troubleshooting patterns, not diagnostic criteria. Persistent pain, numbness, or tingling warrants a visit to a physician or physiotherapist rather than a new pillow.

That fourth row catches people out. If the ache is in the shoulder joint rather than the neck, the pillow is often innocent, and the mattress is letting the shoulder bottom out; our explainer on numb arms and shoulders while sleeping covers how to tell the difference.

Pillow loft finder

Answer three questions, and this finder returns a target loft range in inches and centimetres, with the arithmetic shown. It uses the same starting ranges and sink allowances as the tables above, so you can check that it works.

The Hamuq MicroGel Pillow

The MicroGel Pillow is an adjustable-fill pillow, which means you set the loft rather than buying a fixed height. The microgel cotton fill can be moved by hand to make one area thinner and another thicker, so a side sleeper can build height under the neck while a stomach sleeper can flatten it. It is $79 CAD in Standard and $89 CAD in King, with 154 verified reviews on the product page.

Prices in Canadian dollars (CAD), verified against the live product page July 2026, subject to change.

Possible downside, stated plainly: Hamuq does not publish a loft measurement for this pillow, in either its as-shipped state or its adjusted range. If you have already measured your target loft and want to buy a pillow that matches it on paper, that is a real gap, and a brand publishing a specific loft figure will be easier to shop. The counter-argument is that an adjustable pillow is measured on your bed rather than on a spec sheet, and the free return makes testing it low risk. If you want the number before ordering, ask Hamuq support.

Being fair to the competition on the pillow question specifically: Douglas bundles two memory foam pillows free with a mattress purchase, which is genuinely better value if you need pillows and a mattress in the same order, and Endy sells a customizable pillow with removable fill in the same category. Hamuq's case is the adjustable microgel fill and the free two-way shipping, not price leadership.

Pillows in real Canadian bedrooms

Three shorts from the official Hamuq channel, picked because each one shows a bed made up with the pillows in place rather than an unboxing. They play here on the page. None of them is a loft measurement, so the chart and the tape measure above stay the reference; these are just what the numbers look like on a finished bed.

From the official Hamuq channel, played in privacy-enhanced mode. Videos are lazy-loaded, so nothing downloads until you scroll to them.

Choose your loft

Frequently asked questions

What pillow loft do I need for my sleep position?

Side sleepers generally start at 4 to 6 inches (10 to 15 cm), back sleepers at 3 to 5 inches (8 to 13 cm), and stomach sleepers at 0 to 3 inches (0 to 8 cm). These are starting ranges rather than fixed rules. Your shoulder width and how far your mattress lets your shoulder sink can move the right number by an inch or more in either direction.

What is pillow loft?

Pillow loft is the height of the pillow measured under load, with your head resting on it, not the height of the pillow sitting empty. The loft determines whether your head stays level with your spine or tips up or down. Manufacturers usually list an unloaded figure, so expect the real loft to be lower than the number on the label.

How do I measure the right pillow height for me?

Measure horizontally from the side of your neck to the outer point of your shoulder while standing against a wall, which is usually 5 to 7 inches for adults. Subtract how far your shoulder sinks into your mattress, roughly 1 inch on a firm bed and up to 3 inches on a plush one. The result is your side-sleeping loft.

Is a higher pillow better for side sleepers?

Higher, yes, but only up to the point where your head sits level with your spine. Side sleeping creates the largest gap between the head and the mattress, so it requires the most loft of any position. Going past level tips the head upward, and published research found that raising pillow height from 110 mm to 170 mm increased average cranial pressure by roughly 30 per cent.

Should stomach sleepers use a pillow?

Many stomach sleepers are more comfortable with no pillow under the head or with a very thin one, 3 inches (8 cm) or less. Face down, the head is already close to the mattress, so added height forces the neck into extension on top of the rotation the position already requires. A thin pillow under the hips often helps more than one under the head.

Does my mattress affect what pillow loft I need?

Yes, and more than most people expect. A firm mattress lets your shoulder sink about an inch, while a plush one can let it drop three, and the pillow has to fill whatever gap is left. Moving from a plush bed to a firm one can increase your required loft by 2 inches, which is larger than the gap between most brands' medium- and high-loft options.

Is there a scientifically correct pillow height?

No single correct height has been established. A 2021 review of pillow height determinants concluded that an optimal range for cervical alignment cannot yet be identified from the available evidence, and that no firm conclusions exist for back or side sleeping. Research clearly shows direction, so use published ranges as a starting point and verify the fit on your own bed.

Final word

Start from the chart, then measure, then check the photo. Side sleepers begin around 4 to 6 inches, back sleepers 3 to 5, stomach sleepers as low as they can manage, and everyone adjusts from there based on shoulder width and how far their mattress lets them sink. If you would rather set the height than guess it, the Hamuq MicroGel Pillow is $79 CAD, with a fill you can move by hand and free returns if the loft is not right for you.

Written by Jordan Bedwell, Co-Founder, Hamuq Inc. Compiled the loft ranges and measurement method in this guide from published pillow height research and standard retail loft categories, and summarised the peer-reviewed findings cited above.

Reviewed by Nathan Nielson, Hamuq. Verified the MicroGel Pillow specifications, CAD prices, warranty terms and the absence of a published loft figure against Hamuq records in July 2026.

Sources and references

Pillow height determinants and the absence of an established optimal range: Yang et al., Ergonomic Consideration in Pillow Height Determinants and Evaluation, Healthcare, 2021. Cranio-cervical pressure and spinal alignment across four pillow heights: Ren et al., Effect of pillow height on the biomechanics of the head-neck complex, PeerJ, 2016. Individualised pillow height for side sleepers: The individualised optimal pillow height and neck support design for side sleepers, 2024. Product specifications and prices verified against live Hamuq product pages, July 2026. Prices in Canadian dollars (CAD), subject to change. This page is general information about pillow sizing and is not medical advice.

Related reading

• Does your pillow affect the quality of your sleep?
• Mattress firmness by sleep position and body weight chart
• Best mattress for side sleepers in Canada
• What is your sleep position?
• Best mattress in Canada: the full buying guide