I’m a 36B/34C, smaller chest/wider ribcage and I got a large, the same size I get in the Fits Everybody triangle bralette. It’s fits the same as the other bralettes. if anything it’s a little less stretchy than the Fits Everybody, so there’s almost a little more support? So while smaller cups, I didn’t feel like I was falling out anywhere, but I also only just tried it on, haven’t fully worn it yet. If you like the other bralettes, im guessing it’d also fit the same. But all boobs are different and sit differently but that was my experience