I wish they would give up on the idea that a D is huge and make a couple more cup sizes.
Have you had a look at the Bra Band Project?
And with you there on the Disney bras!
Having an A-D cup means having in difference between your underbust and overbust, which in reality is not that much.
This bra is great if you are looking to add some major curves.
Charley is a similar size to you though and finds that Gossard work really well for her and give her cleavage!
This website is awesome.
This is my favorite bra from TLBC.
A difference of 4 inches, a D cup!
So 34D bra and a 28D bra means exactly the same boob volume.