The balconette bras by Cacique are wonderful. I have loved them for years. While they have extended their size availability, I will soon size out of their options again. Brand new, this bra fits on the tightest set of hooks. The straps were way too long but I took this to a tailor and had at least 2" taken out. Now the straps are barely short enough. I should have had the tailor take out more of the length.
Wow, I can't believe how tight this band is, I would have to wear a 34 in this style. So go up one band size from your usual. The cup is one size too large for me. So ideally, I would try this in a 34C, which they do have now, but they don't do exchanges. This would fit a 30F US most likely. The cup fabric is slightly stretchy so the depth actually stretches to about 9.3" or so, the measurements in the data table are non-stretched depth.
I'd say if you don't like your bands tight, go up 2 bands and down two cups (or more, seriously, in larger sizes their cups are ginormous)