You can't base what size is large just on letter. This girl is a C cup: This girl is a D cup: This girl is a DD: As you can see, none of the those girls have huge boobs. All a C cup means is a 3 inch difference between the underbust and bust measurements, 4 inch for D, 5 inch for DD. It's totally dependent on the band size. A 34A has the same exact volume as a 32B, a 30C, and a 28D. What about an F cup? Think that would be MASSIVE? Well, not necessarily: Hope this helps!
It depends on the girl's frame and weight. In general, for thin girls of small to average height big starts at 34C. Average to taller thin girls, 36C.
D is large size.
C is still medium, but D, DD(E), DDD(F) are large, with G and up being extra large.
start at D
C is the starting point of the big ones
