Seats are comfortable relating to human scale. Crowd followed the crowd there are differences, generally North of tall, slightly short of the South, North America and Europe will be; differences between men and women, there are differences in individual and individual. So Schwartz uncomfortable, give it a try just know, mainly to see what time below:
Seat depth: sitting in chairs, seat depth should be equal to the length of the thigh, sat down and bend of the knee happens to chair, the seat is too deep, waist and back without landing; the seat surface is too shallow, thighs don't have enough support, are uncomfortable.
Seat height: should be equal to the lower leg length, seated calf down, foot landing. Too high, legs hanging my thighs oppressed too much and too long is not good; the seat is too low, legs on the seat surface are not body weight into hip compression, uncomfortable over long.
Chair: best things to waist, back and neck that all or part of the holding role. Longer Chair, supporting the better. Dining Chair only when dining, you can ignore the neck, and Office chairs are the best can be looked after. Imported furniture is often more suitable for the production of country populations, chosen need extra attention.
The material of the seat and back: both should be "soft" type--supports are strong enough, but have a certain thickness of the elastic layer on the surface. Most materials should be in contact with human body outside ventilation, wear-resistant, stain-resistant, and not as easily as a human body or clothing to produce static electricity.