1. The height of the sofa seat
The seat height of the sofa should be consistent with the height of the knee bent, generally between 38-48 cm. The average height of the Chinese calf (below the thigh after sitting down) is 42 cm, so the height of the seat surface of the finished sofa on the market is generally maintained at about 42 cm, this height includes the size of the seat surface after the pressure is added to the weight.
If the height of the sofa is too high, the feet of a person will hang in the air when sitting on it; if the height of the sofa is too low, it will be very difficult to stand up.
2. Sofa backrest height
The ideal height of the sofa backrest is about 68-72 cm. The ideal angle between the cushion and the backrest of the sofa is between 100 degrees and 108 degrees, because this is just enough to allow people to lie back comfortably on a large area.
In addition, the height of the center points of the three supporting areas of the waist, back, neck and head on the backrest are respectively about 150mm-180mm, 380mm-420mm, and 450mm-480mm.
3. The sofa is wide
The seat width of a single sofa should not be less than 48 cm; the seat spacing of each person on a three-seat sofa should be 45-48 cm; the seat spacing of a two-seater sofa can be larger, 50 cm.
However, there is no uniform standard for this size. You can choose the right size according to your body shape and needs.
4. Sofa depth
A common sofa has a depth of 90 to 100 cm, which is basically the depth at which everyone can sit cross-legged. In addition, the depth of the seat surface should be between 48-60 cm.