Really??
I mean i think that depends on first of all, the country you live in.
2) your goals in life
3) the type of ppl ur around
tbh i am a girl and i know if even i reach 160 cm or sth, its ok, but still considered short.
Idk but i talked to certain ppl who did it, and they make u feel like its nothing, so if you want another 6cm or 5cm after stryde would you go with full external?
Because really honestly from whatve seen height is a big issue in this world, u get treated 100% different with a 13 cm height difference its like you are someone else. 
160 cm is great for a girl. Thats my wifes height and to be honest i love her that way. Do what makes you feel better not what other people think.
