So far I have only had good experiences with Giroflex office chairs, especially when sitting for longer periods. No one can reliably answer your question about the seat height from a distance. The seat height can be adjusted between 39-51 cm (I assume that this has the most influence on your height). If you have an office chair that fits your height requirements, the best thing to do is to measure the seat height there and see if it is also in the 39-51 cm range.