You must be of size medium to small then because legroom is definitly an issue for me, especially for longer flights and I'm just 180cm. (just below average hight)
Or alternativly you can afford better seats than me.
Or alternativly you can afford better seats than me.
https://en.wikipedia.org/wiki/Average_human_height_by_countr...
On the other hand, I took an Iceland Express flight many years ago, and my knees were uncomfortably pressed against the seat in front.
It does seem to be all over the place.