How to Choose the Right Pillow Height

Loft is simply the height of the pillow from the surface it rests on to its top. Sellers usually quote it uncompressed, measured on a flat surface with nothing on the pillow — which is not the height you actually sleep on, because a head compresses a soft pillow considerably more than a firm one.

Rough conventions place low loft under about 8 cm (3 in), medium loft between about 8 and 12 cm (3 to 5 in), and high loft above roughly 12 cm (5 in). These bands are not standardised and different sellers draw them differently, so treat them as orientation rather than as a specification you can compare across brands.

• Low loft: under roughly 8 cm / 3 in.
• Medium loft: roughly 8-12 cm / 3-5 in.
• High loft: above roughly 12 cm / 5 in.
• Contoured pillows usually quote two figures — the higher and lower contour edges.

The practical purpose of a pillow is to fill the space between your head and the mattress so your head is supported in line with the rest of you, rather than propped up or hanging down.

On your side, that space is roughly the width of your shoulder, so broader shoulders generally need more loft. On your back, the gap is much smaller — the back of your head already rests close to the mattress — so a lower loft is usually needed for the same person. Face down, the gap is smaller still, which is why very thin pillows, or none at all, suit that position.

Loft only makes sense relative to the surface underneath it. A soft mattress lets your shoulder sink in, which closes part of the gap and means you need less pillow height than the same body would on a firm surface. A firm mattress holds your shoulder up, leaving a larger gap and calling for more loft.

This is the most common reason a pillow recommended by a friend or a review feels wrong: the advice was accurate for the bed it was tested on. If you change mattresses, expect your pillow preference to change with it.

Two pillows quoted at the same height can sleep at different heights. A soft pillow compresses under the weight of your head, so its effective loft during the night is lower than the figure on the box. A firm pillow compresses less and sleeps close to its stated height.

The practical consequence: if you are choosing a soft pillow, a slightly higher stated loft often ends up about right, while a firm pillow at the same stated loft may feel too tall.

You do not need any equipment to assess this. The clearest evidence comes from how you sleep and what you do with the pillow during the night.

• Too high: your chin is pushed toward your chest, or you wake with a stiff, tight feeling along the side of the neck.
• Too low: your head tips back, or you find yourself folding the pillow in half or sliding a hand or arm underneath it.
• About right: your head, neck and spine form a relatively straight line when someone looks at you from behind, and you are not constantly repositioning.
• Position-dependent: if it is right on your back but wrong on your side, you may be a combination sleeper who needs a contoured or adjustable pillow.

If you change position during the night, no single fixed loft is right for all of it. Two designs address this. Shredded-fill pillows with a zip let you remove or add fill until the height suits you, which is the most direct solution when you do not know your number in advance. Contoured pillows offer two different heights along the pillow, letting you turn it to a taller or shorter edge.

Both approaches involve compromise, and neither is universally better. What matters more is that the pillow can be adjusted or returned, because loft is genuinely difficult to judge from a product page.

Loft is the specification most worth pinning down before you pay, and the one most worth protecting with a return policy afterwards.

• Find your usual position, or acknowledge that you change during the night.
• Note whether your mattress is soft or firm.
• Look for the loft figure in centimetres or inches, not just a word like "medium".
• For contoured pillows, find both contour heights.
• Prefer adjustable fill if you are unsure of your number.
• Check the return window before ordering — loft is often only testable in use.