I'm a 34F/G...so figuring out how to translate that to small med large is always challenging. I bought these while currently in my third trimester because I've blown through too many expensive and uncomfortable bras already and just trying to get to the end. These feel great, good coverage both around my top and sides as well as cleavage= cut high in the neck, but still a v-neck. Offers light to moderate support and feels good on my belly. I wish I could easily compare the fit to a medium. I think for right now, a size down would be a bit better. Hard to say postpartum...without my giant belly it might be way too big. The cups have a hard time staying flat, and look a bit rumpled under smooth dresses and tops...worth the try overall and I will likely keep wearing as is for now.