I'm 166-167. I have the same sitting height(exact almost) as a guy who's 180cm.
And my friend 5'9 not, but a guy who's 6f is just like 5cm taller in sitting height, and same with everyone else.
People keep telling me if you lengthen more than 10cm its gonna look weird(not gonna do more than 10cm but besides the point)
Just curious and some insight?