The best pillow height for most adults is 3 to 6 inches, depending on how you sleep.
Pillow height for side sleepers runs highest, at 5 inches or more, to fill the gap between your head and shoulder. Back sleepers usually do well at 3 to 5 inches. Stomach sleepers need under 3 inches, or no pillow at all.
Key Takeaways
- For most adults, the best pillow height is 3 to 6 inches, set by your sleep position, frame and mattress.
- Side sleepers need 5 inches or more, back sleepers 3 to 5 inches and stomach sleepers under 3.
- Measure your neck-to-shoulder gap, then adjust in half-inch to one-inch steps, giving each new height a few nights before you judge it.
Below, you’ll learn how to measure your own fit, what changes by sleep position and the signs your pillow is off. Sleep on your side? Pair the right pillow with our guide on where to put your arms when sleeping on your side.
What Is Pillow Height (or Pillow Loft)?
Pillow height, also called pillow loft, is how thick your pillow is when it lies flat on the bed. It sets how far your head sits above the mattress and how well your neck keeps its natural curve overnight.
Pillow lofts usually fall into three groups, using the ranges Sleep Foundation gives:
- Low loft: under 3 inches
- Medium loft: 3 to 5 inches
- High loft: over 5 inches
Those numbers describe the pillow before you lie on it. What your neck feels is the height left once your head sinks in, and the fill changes that a lot.
Memory foam holds most of its shape, while down and fiberfill flatten under weight. That means a 5-inch memory foam pillow can keep your head higher than a fluffier 6-inch one.
Use the numbers as a starting point, then let your neck have the final say.
Pillow Height by Sleep Position
Side sleepers need the most pillow height, at 5 inches or more. Back sleepers do best at 3 to 5 inches, and stomach sleepers need under 3
Here’s how each position compares, plus a starting point if you switch positions overnight.
| Sleep Position | Pillow Height | Loft | What to Look For |
| Side | 5 inches or more | High | Firm, contoured or adjustable fill that holds its height all night |
| Back | 3 to 5 inches | Medium | Memory foam or a contoured shape that supports the curve of your neck |
| Stomach | Under 3 inches, or none | Low | Soft, thin fill that compresses easily |
| Combination | Start at 4 to 5 inches | Medium to high | Adjustable height so one pillow works on your side and back |
Your build fine-tunes where you land in each range. Broad shoulders or a firm mattress push you toward the higher end, while a smaller frame or a softer mattress pulls you lower.
Stomach sleepers who find even a thin pillow too much can read our guide to sleeping without a pillow.
How High Should Your Pillow Be?
Your pillow should be high enough to keep your head level with your spine, which for most adults means 3 to 6 inches. Where you land in that range depends on how you sleep, how broad your shoulders are and how far you sink into your mattress.
Research supports the “it depends” answer. One 2021 review of pillow height studies found “no firm conclusions about the optimal pillow height” for back or side sleeping. Instead, the authors pointed to measurable factors that vary by person. These include neck alignment, body size, contact pressure and muscle activity.
Sleep position is the easiest of those to work with:
- Side sleepers need the most height to bridge the space between head and shoulder.
- Back sleepers need less, just enough to fill the curve of the neck.
- Stomach sleepers need the least, since extra lift bends the neck back while the head is already turned to one side.
How to Find the Right Pillow Height for You
Find your right pillow height by testing it in your usual position, checking your alignment, measuring your shoulder and adjusting from there.
These five steps take one evening to start and a few nights to finish.
1. Lie Down in Your Usual Sleep Position
Get into the position you fall asleep in and rest on your current pillow for a few minutes. Your neck should feel relaxed and level, with no tilt up toward the ceiling or sag down toward the mattress.
2. Check Your Alignment in a Photo
Ask your partner to take a photo while you lie in your usual position, or prop your phone up and use the timer. Your head and neck should continue the straight line of your spine instead of angling up or down.
3. Measure Your Neck-to-Shoulder Gap
If you sleep on your side, measure from the base of your neck to the outer edge of your shoulder. That distance, minus how far your shoulder sinks into the mattress, is roughly the pillow height you need.
4. Adjust in Small Steps
Change your pillow height about half an inch to an inch at a time, then give each setting a few nights before you judge it. Height-adjustable pillows like the Ecosa Pillow and the Ecosa Cooling Pillow make this easier, since both come with removable 0.8-inch and 1.2-inch memory foam pads.
5. Notice How You Feel in the Morning
Waking up with a stiff neck, sore shoulders or a tight upper back often means your pillow height is off. If you wake up pain-free and in roughly the same position you fell asleep in, you’ve likely found your fit.
High Pillow vs Low Pillow: Which Is Better?
Neither is better on its own, since high pillows suit side sleepers and low pillows suit stomach sleepers. Back sleepers usually land in between, on a medium pillow. The right one keeps your head level with your spine, so your position, frame and mattress decide it. Here’s where each one helps, where it goes wrong and who it suits.
High Pillow
High pillows stand over 5 inches tall and work best when there’s a wide gap between your head and the mattress. Too much height for your build, though, bends your neck as surely as too little.
| Pros | Cons |
| Fills the gap between your head and shoulder on your side | Tucks your chin on your back, which may narrow your airway |
| Takes weight off your lower shoulder overnight | Cranes your neck backward when you sleep on your stomach |
| Holds your head level on firm mattresses where your shoulder can’t sink | Overshoots your shoulder gap and leaves your neck stiff by morning |
Best for:
- Side sleepers
- Broad shoulders
- Firm mattresses
Low Pillow
Low pillows stand under 3 inches tall and keep your head close to the mattress. That’s ideal when there’s little gap to fill and a problem when there’s a big one.
| Pros | Cons |
| Keeps your neck near neutral when you sleep on your stomach | Lets your head drop toward the mattress on your side |
| Supports smaller back sleepers without tucking the chin | Leaves you folding it in half or tucking an arm underneath |
| Works with soft mattresses that let your body sink lower | Flattens even more over time if it’s filled with down or fiberfill |
Best for:
- Stomach sleepers
- Smaller frames
- Soft mattresses
Find Your Pillow Height With Ecosa Pillows
The easiest way to land on the best pillow height is with a pillow you can adjust. Both Ecosa pillows have a contoured tall side and short side. Each also comes with three removable memory foam pads (two 0.8-inch and one 1.2-inch) for fine-tuning.
Pick the Ecosa Pillow for contoured memory foam with a breathable 3D structure that helps heat and moisture move away from the surface. Hot sleepers can go for the Ecosa Cooling Pillow, which keeps the same adjustable design and adds cool-to-touch fabric and a cooling gel layer.
Every Ecosa pillow comes with a 100-night trial, so you can test your height at home before you commit.