Height. The height of the compressed pillow = (shoulder width-head diameter) /2, which is generally the height of one's fist.

Width. The width of the pillow should be 65438+ 0.5 times of the shoulder width to prevent the head from falling off the pillow when sleeping. ?

Soft hardness. A comfortable pillow should be soft, with certain hardness and elasticity.

Shape. The shape of the pillow should conform to the physiological curve of the spine. It is best to make a concave shape before going to bed, and put your head in a concave place to make your neck feel naturally supported.