I am a 34DDD pre pregnancy.  I'm currently 21 weeks and my normal bras are beginning to be a bit small on me but still wearable. This is very comfortable and fits well. I'm not sure if it will fit me once I'm breast-feeding  or if it will fit later on in the pregnancy. I feel like ordering maternity and nursing bras is tricky like that!  I'm going to keep these anyway because they're very comfortable and I could wear them again later after I'm done breast-feeding and I can wear them now. I ordered a busty medium based on the size chart.