The size of breasts is related to heredity and hormone levels. For women with developing breasts, you can make them bigger by wearing the right underwear and exercising. 1. Wear the right underwear: usually pay attention to wear the right size of underwear, do not be too binding, to ensure that the blood circulation in the chest is smooth, and is conducive to the healthy enlargement of the breasts. 2. Adhere to the exercise: daily life can be more chest expansion exercise, help to avoid sagging breasts, so that the chest is straight, in favor of breast health and enlargement. If your breasts are small, you can improve them in the above ways, and it is recommended that you increase your nutrition in your daily life and insist on exercising, so that your breasts can increase in size in a gradual and orderly manner.