There is no fastest and best way to reduce the size of breasts. Generally, breasts can be reduced through surgery and exercise. 1. Surgery: Breast reduction surgery mainly includes excision surgery, liposuction surgery, etc. Excision surgery mainly removes enlarged glandular tissues so as to achieve the effect of breast reduction, and the effect of surgery can be maintained for a long time. Liposuction surgery is mainly through special liposuction equipment to remove excess fat from the chest, so as to achieve the effect of narrowing the chest, but pay attention to diet, there may be a rebound. 2. Exercise: Exercise is mainly through chest expansion exercises, jogging, jumping rope to reduce breasts. Chest expansion exercise can exercise the fat and muscle tissue around the chest, long-term chest expansion exercise can reduce chest fat, and play the effect of reducing the chest. Jogging and jumping rope are a kind of whole-body weight loss exercise, so they are effective in reducing fat and shrinking breasts. 3. It is not recommended to do breast reduction surgery for minors whose breasts are not mature, as it will affect the development of breasts. If you are not feeling well, it is recommended that you go to a regular hospital and ask the doctor for guidance.