Am I taller than all teens? I am 16 and 5'7 ( 170-171 cm ) and

So you are saying a girl who is 5'8 is shocking? Seriously? 🤣

It is more than feasible for a girl to be above average size. It doesn't make it shocking - which btw is a pretty vile way to think of someone.
Women of the Masai tribe average 6 foot. For them being 5'7" would be 'shocking' - Short arse!

and here's a thought if you don't understand the definition of a word google it!

@Pigeon12345 7 foot