You should wait to have rhinoplasty until your bones, and particularly the bones in your face, have stopped growing or are near their final size and form. For females, this is usually by about age 16, and for males by about age 17, but the specific age varies from person to person. One way to judge this is by the curve of your growth chart. If you are within an inch or two of your projected adult height, the bones in your face are unlikely to change significantly, and you may be ready for rhinoplasty. If you might still grow another four to six inches, you should wait.