How old do you have to be to have a boob jo
The human race is a very diverse species. Some women are destined to have larger breast and others smaller. There is also a wide range of time when breast can develop, usually up to the age of 21 or 22. there are other reasons for delay breast development which can include hormonal issues or extremes in weight. If one suspects that they may have an abnormality in their physiology, a good examination by one's primary care physician should be performed.
I hear your frustration, but you'll need to wait until you are at least 18 to discuss a breast augmentation. If, at that time, you are still not happy with your breasts, then book a consultation with a board certified plastic surgeon in your area to discuss your options.