Breasts come in all shapes and sizes, for example, some women have very full volume breasts that are fuller at the top creating a more rounded breast shape and some women have less full breasts giving a more tear-drop shape breast. Two women with the same bust measurement but different shape breasts may therefore need different cup sizes or may be better suited to certain bra styles e.g. plunge, balcony, full cup etc..
Below are a few illustrations that demonstrate how breast shape can vary from person to person.
Images copyright: Katherine Hamilton