FYI: I use these to sleep in, I'm not a nursing mother.

I'm a 38DD and after reading the details, I bought size small which you don't often do when you're my size. They fit pretty well but I thought maybe a little more room would be nice so the next time I ordered them I got Mediums. They're so much bigger, I wish I had bought another set of small. I really like these, they are soft and don't stretch out quickly but if you're going to buy them, make sure you measure accurately.