9. One of the breasts is always bigger than the other.
No woman has absolutely symmetrical breasts. The difference in their size can either be invisible or quite noticeable, and there could be lots of reasons for this. For example, it could be a difference in the volume of breast tissue, the size or shape of the breast pocket, or even the elasticity of the skin on each breast. However, there’s nothing to worry about as it’s a totally natural and normal occurrence.