Back sleepers need a medium-loft pillow that supports the natural curve of the cervical spine without pushing the head too far forward. A pillow that is too high tilts the chin toward the chest and compresses the throat. A pillow that is too flat lets the head fall back and strains the neck muscles. The ideal range for most back sleepers is 10 to 14 cm in height with a medium firm feel that provides support without rigidity.

Memory foam and latex-like smart foam pillows work well for back sleepers because they contour to the head and neck shape rather than compressing flat under sustained pressure. The Mlily Rebound Smart Foam Pillow at 15 cm is specifically designed for back sleepers, using a latex-like smart foam core that responds naturally to movement without the sinking feeling of standard memory foam.

Side sleepers have the largest gap between the shoulder and the head, and need the highest loft of any sleep position to fill that space and keep the spine level. A pillow that is too low causes the head to drop toward the shoulder, compressing the cervical spine on one side. The ideal range for side sleepers is 12 to 16 cm depending on shoulder width, with a firmer feel that resists compression under sustained lateral pressure.

Contour pillows work particularly well for side sleepers because the higher side fills the shoulder gap and the lower side accommodates the occasional switch to back sleeping. The Mlily Gel Infused Contour Pillow provides a 14 cm high side and 12 cm low side with gel-infused open-cell foam for heat management through the night. The Loren Williams Ergo Balance Pillow is ergonomically shaped for side sleeping with targeted head and neck alignment across multiple sleep positions.

Stomach sleeping is the most challenging position for spinal alignment because the neck is rotated to one side for the duration of sleep, creating sustained lateral tension. A very low, soft pillow reduces the rotation angle and minimises strain. Stomach sleepers generally do best with a pillow at or below 10 cm in height that compresses easily rather than pushing the head higher. Some stomach sleepers find no pillow under the head, combined with a pillow under the abdomen, is the most comfortable approach.

The Mlily Sensicloud Rebound Pillow at 12 cm with a cloud-like, non-sinking smart foam feel is the closest option in the Bedworld range for stomach sleepers who still want some pillow support.

Combination sleepers shift between back, side, and sometimes stomach positions through the night. They need a pillow that accommodates multiple positions without requiring adjustment each time they move. A mid-range loft of 12 to 14 cm with a responsive, pressure-adapting material works best. The pillow should bounce back quickly when pressure shifts rather than holding an impression.

The Mlily Gel Infused Traditional Pillow at 14 cm in the traditional profile suits combination sleepers who want a single pillow that adjusts across positions. The Sensicloud Rebound Pillow also works for combination sleepers due to its responsive smart foam that does not lock into a fixed shape.