Generally, a person can get a mentoplasty once their facial bones are fully grown. For most people, this happens around age 18. It’s super important to wait until then. Getting it done earlier could mess with how your face develops, and nobody wants that.
For younger folks, it’s really important to hold off to make sure the results are stable and safe. Always chat with a qualified surgeon to figure out the best time. They’ll be able to check if everything’s ready to go. If you’re thinking about chin surgery, talking to a pro is the way to go!