I just received this dress. I'm 5'8\", 38C/D bra, and a size 16/16W in pants. I got the m in this dress. I measured myself before buying . Reviews convinced me to get my standard size and I'm glad I did. It fits perfectly. I prefer my dresses to be more low cut so I like this, but you could easily pull the fabric crossing the bust higher and put a small stitch in it to make it more modest.