What do the letters for bra sizes stand for

Have you ever wondered why A, B, C, D, DD, E, F and G are the letters used to define bra sizes? If you have wondered why, but couldn't figure out what the letters stood for... It is about time you became informed! {A} - Almost Boobs... {B} - Barely there. {C} - Can't Complain! {D} - Damn! {DD} - Double damn! {E} - Enormous! {G} - GEEEEzus Christ! {F} - Fake