I went with my instincts and grabbed a size l as opposed to my usual medium.  fits great and flatters the girls while hiding my meaty back!  such a great artistic design, i will love wearing it this weekend.  i am scared to wash it, i may just have to dip it in lingerie powder and drip dry.  for fit reference: 140#, 36dd, i hold my weight in my neck, shoulders, back, upper arms, tummy (i'm not a gorilla.)