This is frustrating for some although absolutely normal. Gradually as the rest of the body catches up and the brain adjusts, their clumsiness will lessen and their athletic prowess will return. Neither are the case and the breast growth usually goes away. As males are often worried about penis size through their lives, so females are worried about breast size. It is important to assure girls that breasts of any size can fulfil their purpose of breastfeeding.
Breasts come in all shapes and sizes.
As for penises, the adult, erect penis is about 5-7 inches long. The penis only needs to be about 2-3 inches long to successfully deposit semen into the vagina. Studies have revealed that partners do not care about penis length in their lovers and that men with a longer penis are not more virile or athletic. Some girls experience a small amount of facial hair growth usually limited to fine dark hairs on the upper lip. This bothers most girls.