Usually around 460MM. Special arm soft back don't sit upright chairs can be reduced to 430MM.
Two is when the arms are naturally drooping, the upper arm and the arm are basically vertical, and then the height of the table should be just below the lower arm level plane contact. This allows the person to maintain proper sitting and writing positions. If the table and chair height collocation is unreasonable, will directly affect people's sitting posture, is not conducive to the health of users. Therefore, the desk under the table space is not less than 580mm, the space width not less than 520mm.
The correct height tables and chairs should make people sit to keep two basic vertical, one is when the feet flat on the ground, thigh and calf can basically vertical, then the seat front cannot form the oppression of the thigh under the plane.
