This chair is not only comfortable but extremely flexible so whatever size you are the possibilities of altering not only the height of the seat hydraulically but the angle of the back which also has a brilliant flexible lumber support and the actual sitting part can move forward or back to suit short or long thighs and it also can tip forward a little which is supposed to aid the general comfort of sitting for any length of time. It is really good for anyone wishing to improve their posture whilst staring for any length of time at a screen. It is also good value compared to similar models advertised elsewhere.