Here's the thing - the sequins and beading are BEAUTIFUL, but they are applied to a poorly fitting bra.  If this manufacturer would take it's awesome design and sequin techniques and just sew them on a different plain bra base, this top would improve 500%.
I'm a 34B and ordered a Small - the cups were closer together in the middle than normal, and were smaller circumference than usual, resulting in enormous "side boob" near the armpits.  Just for kicks I tried it on over a plain bra I normally wear - the cup difference was apparent.  I actually could have worn it over that plain bra if I wanted (it showed a bit on the sides, covering the side boob, had a nice layered look).
Based on the other reviews that the cups didn't necessarily get larger when sizing up, I chose to return it (I did not validate if the cups were in fact larger on the bigger sizes).