How bra stores seem to think things work:

Anything smaller than a C cup: must be pre-pubescent. Ugly patterns, and colours. Lots of animals and stripes.
C to D cup: A woman! Pretty lacy things, nice patterns, large variety.
Anything over a D cup: Beige. Lots and lots of beige. thin as fuck fabric that you nippin in through the summer. fat ass straps. anything remotely attractive is $70.