Humans grow most quickly when young, and to a lesser extent in preadolescence and early adolescence. However an equilibrium is then reached in adulthood, typically at around 1.6/1.7 meters tall.
I have found the age at which people "stop growing", meaning that they are at their tallest hight, is around the age of 21-25.
Why is it beneficial for humans to grow to 1.6/1.7 meters?
Why is there so so much variation in this, with some reaching there full height in there early teenage years?