How big are breasts?

Breast size can vary greatly from person to person. The size of a person's breasts is determined by a number of factors, including genetics, body fat percentage, and age.

On average, the diameter of a woman's breast is between 10 and 12 centimeters (4 and 5 inches), and the weight of each breast is between 200 and 300 grams (7 and 11 ounces). However, some women may have breasts that are larger or smaller than average.