Hello Neyhh thanks for your question. At 16 years of age it is likely that you will still have breast development as you have not yet completed your growth. It is very common for women in the same family to have very different breast sizes. I know of numerous families where I performed breast reductions on sisters or a grandmother, mother and daughter and the other sister had A or B cup breasts. I would not suggest that you even consider augmentation, however if you are it is definitely premature as implants are not approved except for congenital deformities/reconstruction until you are at least 18 for saline and 22 for silicone implants. I hope this helps, regards. Dr. Joseph Eby