The best pillow for a side sleeper is not necessarily the best pillow for someone who sleeps on their back. The difference often comes down to one practical detail: how much space the pillow needs to fill between your head and the mattress.

Your sleeping position affects pillow height, support and how your neck rests throughout the night. But your shoulder width, mattress firmness and personal comfort matter too.

In this guide, we explain how to choose a pillow for side, back and stomach sleeping, what to look for if you change positions, and how to tell whether your current pillow is the right height.

What is the best pillow for each sleeping position?

Start with your usual sleeping position. It provides a useful starting point for choosing pillow height, although there is no universal height that works for everyone.

These are general starting points, not fixed rules. The same pillow can behave differently depending on your mattress and body proportions.

Best pillow for side sleepers

When you sleep on your side, your shoulder creates a gap between your head and the mattress. The pillow needs to support your head across this space.

If the pillow is too low, your head may tilt downward toward the mattress. If it is too high, your head may tilt upward in the opposite direction.

The aim is a comfortable, relatively neutral head and neck position.

How high should a side sleeper's pillow be?

Side sleepers often prefer a higher pillow than back or stomach sleepers, but the exact height depends on several factors.

• Shoulder width: Broader shoulders can create a larger space between the head and mattress.
• Mattress firmness: On a softer mattress, your shoulder may sink deeper, reducing the height the pillow needs to fill.
• Pillow compression: A pillow that looks high when unused may become much lower once your head rests on it.
• Body proportions: Head, neck and shoulder proportions affect what feels comfortable.

Rather than choosing a pillow solely by its advertised height, pay attention to how high it remains when you lie on it.

What type of pillow suits side sleepers?

Side sleepers may prefer constructions that provide enough height and resist excessive compression.

Examples include supportive memory foam pillows, pocket spring pillows and adjustable pillows with sufficient filling.

A pocket spring construction, such as the Viscospring Signature, combines an elastic spring support system with a contouring memory foam layer.

An adjustable-fill pillow offers a different approach: you can increase or decrease the filling to find a comfortable height.

Neither construction is automatically better for all side sleepers. The actual fit matters more than the material category.

Best pillow for back sleepers

When you sleep on your back, your head and shoulders rest against the mattress differently than when you sleep on your side.

The pillow should comfortably support the head and accommodate the natural curve of the neck without pushing the head excessively forward.

How high should a back sleeper's pillow be?

Back sleepers often prefer a low-to-medium or medium-height pillow.

A pillow that is too high may push your chin toward your chest. A pillow that is too low may not provide the support you find comfortable beneath your neck.

Lie on your back in your normal sleeping position and notice whether your head feels naturally supported rather than forced forward.

Which pillow materials work for back sleepers?

Several constructions may be suitable:

• Memory foam: Provides a contouring surface that responds to the shape of your head and neck.
• Pocket springs with fibre: Combine elastic support with a softer surface feel.
• Adjustable filling: Allows you to reduce or increase the height until it feels comfortable.

For example, Morpheus Firenze combines 60 independent pocket springs with a soft polyester fibre comfort layer. It offers a different feel from memory foam-based constructions.

The choice should depend on your preferred surface feel as well as the height of the pillow.

Best pillow for stomach sleepers

Stomach sleeping creates a particular challenge: the head is usually turned to one side, and a high pillow can increase the angle of the neck.

For this reason, people who sleep on their stomach often prefer a very low pillow. Some may be more comfortable without a pillow beneath the head, depending on individual needs.

Why is a thin pillow usually preferable?

A thick pillow raises the head relative to the torso. While lying on the stomach, this can add to an already rotated neck position.

A thinner pillow reduces the amount of elevation, although it does not eliminate the rotation caused by stomach sleeping.

What type of pillow should a stomach sleeper choose?

Look for a low profile or a pillow that can be adjusted to a very low height.

A pillow with removable filling can be useful because you can remove enough material to create a flatter sleeping surface.

The NOXNOX Adjustable Pillow uses removable filling, allowing you to change the height rather than relying on one fixed configuration.

Very firm, high-profile pillows may be less suitable if they keep the head elevated more than you find comfortable.

Best pillow for combination sleepers

Many people do not remain in one sleeping position throughout the night. You may fall asleep on your side, wake briefly on your back and change positions again before morning.

Combination sleeping makes pillow selection more complicated because each position may require a different height.

Should combination sleepers choose an adjustable pillow?

An adjustable pillow can be a practical choice, particularly if you alternate between side and back sleeping.

By changing the amount of filling, you can find a height that feels reasonably comfortable in both positions.

However, changing pillow height cannot completely solve the differences between all sleeping positions. A pillow that is very comfortable on your side may still feel too high when you turn onto your stomach.

Start by identifying the two positions you use most frequently and look for a comfortable compromise.

Learn more about the available constructions in our Adjustable Pillows guide.

Why mattress firmness changes the pillow height you need

One detail is frequently overlooked when buying a pillow: your mattress.

Two people with similar body proportions may need different pillow heights if they sleep on mattresses with different firmness levels.

On a softer mattress, your shoulder and torso can sink farther into the surface. This changes the distance between your head and the mattress.

On a firmer mattress, your shoulder may remain more elevated, particularly when sleeping on your side. You may therefore need a higher pillow to fill the space.

This explains why a pillow that felt comfortable on your previous mattress may feel different after you replace the mattress.

Practical advice: Always evaluate pillow height while lying on the mattress you normally use, not just by pressing the pillow with your hand in a shop.

Does pillow firmness matter as much as height?

Pillow height and firmness are related, but they are not the same thing.

Height describes the pillow's loft: how tall it is.

Firmness describes how readily the pillow compresses under pressure.

A tall, soft pillow may compress to a relatively low height. A shorter, firmer pillow may maintain more of its original height when you rest your head on it.

That is why the most useful measurement is not simply the pillow's unloaded height. What matters is the support it provides during use.

Different filling materials respond differently:

• Memory foam: Contours gradually under pressure, with a response influenced by the foam formulation and temperature.
• Pocket springs: Provide an elastic response through individually wrapped coils, with comfort layers affecting surface softness.
• Loose fibre or shredded foam: Can often be redistributed and, in adjustable models, removed to change the pillow's height and feel.

If you want to compare these constructions in more detail, read our pocket spring vs memory foam pillow comparison.

How to tell if your pillow is too high or too low

You do not need complicated equipment to make an initial assessment of your pillow.

Start by lying on your mattress in your usual sleeping position. Notice how your head and neck feel when supported by the pillow.

Signs your pillow may be too high

• Your head feels pushed upward when sleeping on your side.
• Your chin moves noticeably toward your chest when sleeping on your back.
• You feel the need to move away from the pillow or repeatedly reshape it to reduce the height.

Signs your pillow may be too low

• Your head tilts downward toward the mattress when sleeping on your side.
• You regularly fold the pillow to increase its height.
• The pillow compresses so much that it no longer provides the support you prefer.

These are practical comfort indicators, not diagnostic tests. Discomfort can have several causes, including factors unrelated to the pillow.

If you have persistent neck pain, our guide to choosing a pillow for neck discomfort

How to test a new pillow at home

When trying a new pillow, make small changes and assess how it feels in your normal sleeping environment.

1. Identify your main position. Start with the position in which you usually fall asleep or spend most of the night.
2. Use your own mattress. Mattress softness affects how much pillow height you need.
3. Check your head position. The pillow should support your head comfortably without an obvious upward or downward tilt.
4. Adjust gradually. If the pillow has removable filling, change the amount in small steps.
5. Notice how it feels over several nights. One brief test may not reflect your experience during regular sleep.
6. Reassess if necessary. If the pillow remains uncomfortable, consider a different height or construction.

A pillow does not need complicated features to work well. It needs to suit your body, mattress and sleeping habits.

Does a cooling or ergonomic pillow change the recommendation?

Cooling features and ergonomic design can be relevant, but they do not replace the need for suitable pillow height.

A cooling pillow may use ventilated side panels, specific cover textiles or other materials intended to improve temperature comfort.

An ergonomic pillow is designed with head and neck support in mind, although the term itself does not guarantee that a particular model will suit every sleeper.

Consider these characteristics after checking whether the pillow's height and basic support feel are appropriate.

Common mistakes when choosing a pillow

• Choosing by material alone. Memory foam, springs or fibre cannot tell you whether the pillow's height is right.
• Ignoring mattress firmness. A pillow can feel different on a soft mattress than on a firm one.
• Assuming thicker means more supportive. Too much height can create an uncomfortable head position.
• Judging only by how the pillow feels in your hand. Its behaviour under the weight of your head is more relevant.
• Ignoring your usual sleeping position. A pillow recommended for side sleeping may not suit someone who spends most of the night on their stomach.

Frequently asked questions

What is the best pillow for side sleepers?

Side sleepers often benefit from a medium-to-high pillow that fills the space between the head and mattress without allowing the head to tilt noticeably upward or downward. The appropriate height depends on shoulder width, mattress firmness and pillow compression.

What is the best pillow for back sleepers?

Back sleepers often prefer a low-to-medium or medium-height pillow that supports the head without pushing it excessively forward. The right choice also depends on the pillow's firmness and construction.

Should stomach sleepers use a flat pillow?

A low pillow is often more comfortable for stomach sleepers because it limits additional elevation of the head. However, stomach sleeping still involves rotation of the neck, and individual comfort varies.

Is a firm or soft pillow better for side sleeping?

Neither firmness level is universally better. The key is whether the pillow maintains a comfortable height under the weight of your head. A soft pillow may compress considerably, while a firmer one may retain more of its loft.

Can one pillow work for all sleeping positions?

Some adjustable pillows can be configured for different positions, but there is no single height that is ideal for everyone. If you change positions frequently, look for a comfortable compromise between your most common positions.

Does shoulder width affect pillow choice?

Yes. Shoulder width affects the distance between the head and mattress when lying on your side. Mattress firmness also matters because it determines how deeply the shoulder sinks.

Do I need an orthopedic pillow for proper neck support?

Not necessarily. A suitable pillow needs to provide comfortable support at an appropriate height. The label "orthopedic" does not automatically establish that a pillow is better suited to your individual needs.

Final thoughts: start with your sleeping position

Choosing the right pillow begins with understanding how you sleep.

Side sleepers typically need more height, back sleepers often prefer a moderate height, and stomach sleepers generally benefit from a lower pillow. Combination sleepers may find adjustability useful.

But these are starting points. Your shoulder width, mattress firmness and the way the pillow compresses are equally important.

Rather than searching for one universally perfect pillow, look for the construction and height that feel comfortable in your usual sleeping position.

Explore the NOXNOX pillow collection to compare available options, or visit our Adjustable Pillows guide if you want more control over pillow height.