How to choose the height of the sofa back, what are the dimensions of the sofa back

Generally, the height of the sofa back is designed according to the curve of the lumbar spine, and there are support points in 1 2 places above the waist to make the body feel comfortable. From the standard scale of the backrest of the sofa, according to the height, the backrest of the sofa can be divided into three types: high, medium and low

The high support provides support for the waist, back and head and neck. The height of the sofa back is generally 490mm-550mm

The middle backrest provides support for the lumbar and back, and the height is not higher than the cervical vertebrae point to ensure that the head can be rotated flexibly; The height of the sofa back is generally 400mm-450mm.

The low backrest provides lumbar support, and the height is not higher than the lower corner of the shoulder blades in the sitting position, so as to ensure that the upper limbs and arms can move flexibly, and the height of the sofa backrest is generally 310mm-350mm.

In addition, the height of the center points of the three support areas on the backrest, the waist, back, neck and head is about 150 mm-

180mm，380mm-420mm，450mm-480mm。