Im a 34DDD And after reading reviews I ordered at 36 and its PERFECT!! It has 6 clasps on the back so it is snug. I jumped up and down moved my arms up and down and I didn't move. I love this bra. Theres no padding at all so if your shirts are sheer youll show nips if you're nippin, good thing the 90s are back and thats kinda a thing now so Im not too worried about it!! Love his bra, Im buying more colors now!!!