I originally tried a 36DD, because it was on sale. But that was a LITTLE tight on one of my breasts, so I decided to size up to a 38DD (since there's no 36DDD). SOMEHOW 38DD felt even tighter, and most surprisingly, tighter in the band! Going to try a 38DDD, but I'm not too hopeful, and may just deal with the tighter 36DD, since it was cheaper.See full review