Herman Miller Aeron Sizes | C The large one is self-explanatory, considered one of the best medical chairs in the world. New price is over 4000 on Amazon, you can check. But because there are pieces in the corner of the chair, it does not harm the use. I will offer it for 900, and please do not bargain. If you are in Jeddah, you can try it before buying. Only serious buyers should come. The headrest is standard from another chair, not from the same company, and it is not 100% installed, but it works. The most important thing is that it doesn't fall off.