Cervical pillow: how to use it and how to know if it’s the right one for you
By the Morfeo sleep team, mattress and pillow manufacturers in Yecla (Murcia) · Updated in September 2026
Quick answer
A "cervical pillow" is not a type of pillow: it is a height. What supports the curve of the neck is not the wavy shape or the product name, but whether the pillow has the number of centimeters your posture needs. When sleeping on your side, you need between 14 and 18 cm; on your back, between 10 and 13; on your stomach, less than 10. If you wake up with a stiff neck, it is almost always because that figure is wrong.
In this guide
"Cervical pillow" is a marketing label, not a technical category. There is no standard that says what can be called that, so under that name you will find everything from 8 cm pillows to 24 cm ones. That is why so many people buy one, notice no difference, and conclude that "cervical pillows don't work for me." The problem is not the concept: it is the measurement.
What a cervical pillow really is
The goal of any pillow is just one: to keep the neck aligned with the rest of the spine, just as when you are standing up. Neither with the head dropped toward the mattress nor pushed toward the chest.
To achieve this, two things are needed, and neither is the shape:
- The correct height. It accounts for 80% of the result. It depends on which position you sleep in and how wide your shoulder is.
- Firmness that does not sink. A 20 cm pillow that flattens to 8 cm when you rest your head on it is, in practice, an 8 cm pillow.
The wavy shape—the classic "cervical profile"—helps keep the neck supported, but it cannot compensate for the wrong height. A pillow with a curve that is 5 cm shorter than you need will still cause you pain.
A fact almost no one publishes
When comparing pillows, you will see words: "ergonomic support," "extra height," "medium firmness." You will rarely see the height in centimeters, which is the only piece of data you can use to decide. When a product page does not include it, ask before buying: without that number, you are choosing blindly.
How to use it (the mistake almost everyone makes)
The pillow goes under the neck and shoulders, not just under the head. The most common mistake is leaving it halfway under the head, with the neck hollow exposed: this way, the weight of the head pulls backward all night.
- Press the pillow against your shoulder. The lower edge must touch the top of your shoulders without them riding up on top.
- If it has a curve, the higher part faces you. The thicker lobe supports the neck; the hollow supports the head. If placed upside down, it raises your chin.
- Check the hollow. When lying on your side, if your hand fits between your neck and the pillow, you need more height. If your head is higher than your shoulder, you have too much.
- Give it ten to fourteen nights. The neck has been in a forced position for months or years; the change will be noticeable, and it may feel strange at first even if the height is correct.
And one thing that matters more than it seems: a pillow only works on a mattress that does not sink. If your mattress gives way in the shoulder area, alignment is lost down there and no pillow can recover it.
Three tests to find out if it is the right one for you
It hurts when you wake up and improves during the day
If stiffness is there when you get up and goes away in an hour or two, it comes from the night. Pain that worsens throughout the day usually comes from somewhere else.
You wake up with your arm under your head
It is your body correcting itself: it is making up the centimeters the pillow is missing. A classic sign of a pillow that is too low.
You fold it in half to sleep
The same thing but in reverse: folding it doubles its height by hand. If you do this every night, you need a taller one, not that folded one.
There is a fourth that is worth three: ask someone to take a photo of you lying on your side, from the front, with your pillow. The line from the nape of your neck to the middle of your back must look straight. If it looks curved upward or downward, you will know which direction to correct.
The height that is right for you, in centimeters
| How you sleep | Approximate height | Why |
|---|---|---|
| On your side | 14–18 cm | You need to fill the entire gap between your ear and your shoulder. This is the position that requires the most height, and the wider your shoulder, the more |
| On your back | 10–13 cm | You only need to support the natural curve of the neck. Too much here pushes your chin against your chest |
| On your stomach | Less than 10 cm | Any height twists the neck. The best pillow is as flat as possible, or none at all |
| You change positions | Medium | Look for an intermediate height, the one that penalizes you the least in the two positions you repeat most |
In the Morfeo range, the AirHigh® measures 18 cm and is the tallest, for sleeping on your side; the SojaVisco® measures 13 cm, medium firmness, for sleeping on your back and for those who change positions; and the Calma measures 12 cm, the lowest and softest, for sleeping on your back and for those who sleep on their stomach.
Memory foam made in Spain. We put the centimeters on the product page so you can choose based on the data, not the adjective.
Two answers
What height do you need?
Which position do you sleep in for most of the night?
Do you wake up with a stiff neck?
Sleeping on your side with a stiff neck is, nine times out of ten, due to a short pillow: the gap between your ear and shoulder remains unfilled and the neck bears it all night. The AirHigh® measures 18 cm and is the tallest in the range, designed exactly for this.
When sleeping on your back, a stiff neck usually comes from a pillow that is too high, pushing your chin toward your chest. The Calma measures 12 cm and is the lowest in the range; if you want something a bit firmer, the SojaVisco®, at 13 cm.
When sleeping on your stomach, your neck is turned almost 90° all night, and no pillow fixes that. The only thing that helps is going as low as possible, or sleeping without one. If you can, start turning over to your side with a pillow between your legs.
If you sleep on your side and it doesn't hurt at all, your current pillow has the correct height: measure it before it expires and buy the next one with that figure. For sleeping on your side, the one in the range is the AirHigh® at 18 cm.
Sleeping on your back without discomfort: yours is a medium height that does not flatten. The SojaVisco® measures 13 cm and is the medium firmness one; the Calma, at 12 cm, if you prefer a soft feel.
You sleep on your stomach and it doesn't hurt: don't change anything, but when you do, look for the lowest and softest. Increasing the height in this position is what starts to cause problems.
These are general guidelines about rest. If the neck pain is persistent or goes down your arm, consult a healthcare professional.
Frequently asked questions
How long does it take to get used to a cervical pillow?
Between ten and fourteen nights. The neck comes from a position you have been repeating for a long time, and at first, the correct one may feel strange. If it still hurts after two weeks, the height is not yours.
How do you place a cervical pillow?
Pressed against the shoulder, supporting the neck and head, not just the head. If it has a wavy shape, the thicker lobe goes toward you, supporting the neck. Placed upside down, it raises the chin and worsens the alignment.
What height should a cervical pillow have?
It depends on your position: on your side, between 14 and 18 cm; on your back, between 10 and 13; on your stomach, less than 10. The wider the shoulder, the more height you need when sleeping on your side.
Is a cervical pillow useful if I sleep on my stomach?
Not much. In that position, the neck is turned all night and no pillow corrects it; what helps is lowering the height as much as possible or sleeping without a pillow. The underlying solution is to switch to sleeping on your side.
Can a cervical pillow be used with any mattress?
It works if the mattress supports. If it gives way in the shoulder area, the shoulder sinks, the neck becomes misaligned down there and the pillow cannot compensate for it.
How often should you change the pillow?
Between two and three years for memory foam. The reliable sign is not the date: it is when it no longer recovers its shape when you let go of it, or when in the mornings you notice your neck as you didn't before.
Does the cervical pillow relieve neck pain?
It relieves the pain caused by poor alignment during the night, which is the one that appears upon waking and improves during the day. Pain that gets worse with the hours, or that goes down the arm, is not a pillow issue: that is assessed by a healthcare professional.
Pillows with the height on the product page
Memory foam made in Spain, from 12 to 18 cm. Choose by the number, not by the adjective.
