I got the matching pants in a size S and they fit perfectly. I’m a 32C and have both sieve bras and whipped bras in size 1. However this was way too tight in the same size. I ended up exchanging for a 2 and ultimately a 3 and the 3 fits best, but still hoping the band stretches out a little. For reference I’m petite (5’3.5” and about 125 lbs). Comfy material though.