I'm a 30C....try finding THAT in a nursing bra! It's very difficult, let me tell you...I have very few choices. None in local stores so I've had to order everything online, mostly from the UK....and since every bra fits differently, it's been frustrating. One of my friends suggested this bra...she raved about the comfort of it and suggested that maybe the size S would work for me. Amazingly this one worked pretty well. It IS very comfortable. Ideally there would be one tighter clasp in back for me to get it a little tighter across the band, but the tightest setting does the job. Hopefully this won't stretch too much and make that an issue. The only complaint I have is regarding the removable cups...I wish this bra was constructed with the cups NOT removable...they shift around a lot during a nursing session and often times I have to readjust them to get them into the proper position afterwards. As other reviewers have mentioned, you can see the outline of the entire cup through the bra. For me, this hasn't been an issue because it's been winter (and a cold spring) so I'm still wearing layers. However, when I just have my tank on, you can see the outline of the cups. It remains to be seen once summer hits how I will feel about that. But, for me being a 30C....this was one of my last hopes and it fit better than most!