The height of the pillow for adults is 15 ~ 20cm when lying on their back, and about 20 ~ 15cm when sleeping on their side. Width: the shoulder is a little wider at most. Hardness: A little less without losing a certain hardness can not only reduce the pressure between the pillow and the scalp, but also maintain the uneven pressure and let the blood circulate through the place with less pressure.

The newborn's spine is straight, so when lying flat, the back and the back of the head are on the same plane, which will not cause muscle tension and stiff neck; In addition, the newborn's head is big, almost shoulder width, and it is natural to lie on the side, so the newborn does not need a pillow. If the head is raised, it is easy to bend the head and neck, affecting the newborn's breathing and swallowing, and even accidents may occur. In order to prevent spitting, the baby's upper body can be slightly raised 1 cm.

When the baby grows to 3~4 months, the neck and spine begin to bend forward, so you can sleep with a one-centimeter-high pillow. When the baby begins to learn to sit for seven to eight months, the baby's thoracic vertebrae begin to bend backwards and the shoulders begin to develop and widen. At this time, the child should sleep on a pillow 3 cm high. Too high or too low is not conducive to sleep and the normal development of the body, and it is easy to form a pillow high hunchback.

When the baby will look up in 3 months, there will be a prominent cervical curvature in the neck of the spine. With the development of the body, the shoulders will gradually widen. ? At this time, in order to make the sleeping posture suitable, pillows should be used. The height of a baby's pillow is about 3-4 cm, while that of a child's pillow is 6-9 cm.