I'm 5'10" - 210 lbs.
I needed the XXL suit; however, I required some alterations (pants hemmed, jacket sleeves and length) and these cost almost as much as the suit itself. It is an awesome looking suit, now though.
Ordered the same size vest a couple weeks later too.
Same size and was very surprised that the XXL fit more like a L or M....won't be wearing it (buttoned anyways).