How do you know when your nose has stopped growing?

The nose has genereally reached its adult size by the late teenage years, but this can vary from person to person.

The nose continues to age, even into adulthood. A rhinoplasty procedure may be an option for you as you grow older to reshape your nose. Best, Dr. Karamanoukian Los Angeles

This question is very controversial. Many surgeons will not do cosmetic surgery on anyone under 18 and some even recommend waiting longer. If you look at research, there is evidence the nose grows into the 20's, however what is not clear is if doing surgery before then actually makes a difference. The safest advice is to wait untill you are 18. It would be awful to make things worse. Dr James P. Bonaparte, MD, MSc, FRCSCOtolaryngology - Head and Neck SurgeryFacial Plastic and Reconstructive SurgeryOttawa, Ontario, Canada

In general, most surgeons won't operate on a female nose until around 16 or 17 years old.  The nose takes time to mature and for your nose surgery to look its best it is important for you to wait until your nose is fully developed.  The only way for you to know for sure is to have a physical examination done by an experienced rhinoplasty surgeon.Good luck!