Love this swimsuit, it's so hard to find bra-like bikini tops that fit a smaller band size and a bigger cup! I will definitely buy another one in the future (so many colours to choose from!). For reference I'm a 34DDD and the medium band size fit me perfectly. Excellent quality overall, the adjustable band is so rare to find and absolutely a game changer. The bottom is also very flattering, the perfect amount of cheeky without making you feel exposed.
You can dive, swim, thrash around and it doesn't budge, all the while looking chic. Can't recommend it enough.