The age at which your face changes the most is between the ages of 40 and 50 years old.
However during your childhood years your face actually changes quite a bit and your face changes shape, size etc from birth until around 18 to 21 years old.
You'll certainly notice a huge facial look as you grow from baby to toddler, little kid, big kid, teen and then adult.
The face will change a lot during those years and then the facial features slow down on changing until you reach around 40 to 50 years old and then it changes some more.
Your face is always changing shape and looks as you get older.
Facial features never really stop changing completely although for most people the facial features are mostly changed by age 18 to 21.
Facial features change the most from birth to age 18 to 21 years old.
Then as you get older your face will sometimes continue to change some but not as much as it did before you were 18 to 21.
My facial features and face changed quite a bit from age 13 years old to 18 years old.
And I also noticed quite a bit of facial feature change from 18 to 21.
After age 21 my facial features stopped changing as much but I do notice that my facial features are still changing after 8 to 10 years.