Ergonomic Executive Desk Chair with headrest

what is the measurement of the seat from front to back i like to sit crisscross in my seat and I have tried and cant find one like my old worn one?

Is this the same chair as the black ZLHECTO model (listed separately) sold by this seller? Or is this larger/different than the black one?

What type of leather is this made of? is it a real leather hide or is it "bonded" or "reconstituted" leather or pu leather?

I am 5'2, 130 pds. I had spine surgery and have sciatic nerve pain in both legs. Is the lumbar adjustable and the seat good quality?