I am between a 32A and 34AA. I purchased the 34A. It fits great and provides really good coverage and support for running. Unfortunately, the lining for the padding is loose and bunches up, so it looks like I am wearing a bra that's too big. You know the look, the bra looks all bunched up and wrinkled over the breast area. I tried reaching in to smooth out the lining to the side, but it inevitably moves while exercising and bunches up again. I received an extra bra by accident and it fit exactly the same, so it wasn't a defect. Also, it's been really hot here in the late summer, so I've been running when it's in the 80-90's, even in the morning. So, post-run, the bra is soaked with perspiration. I do need a lined and padded bra to provide coverage, but unfortunately this one is not breathable at all.
You asked for a sports bra that gave some enhancement instead of the usual flattening effect and we found a great one! Shock Absorber's Pump bra comes with removable pads that add just the right amount of shape using light padding while still giving you the moisture wicking sports fabric you're used to. Lightweight and quick drying. A cup fits both AA and A. 88% Polyamide/12% Elastane.
FIT TIP: These run snug in the band so we suggest you go up 1 band size if you prefer the sports bra to be fitted but not too tight (i.e if you are a 34AA or 34A, go up to a 36A).