I dive the Bare XLT, and am 6'3" and 220 lbs. The LDS had to measure me to be sure the suit was cut properly. I use the two different Bare undergarments; the thin one most of the year, and thick one (I think it's called Polar Extreme when it gets below 50 ... it worked fine in 43 degree water this past Jan in British Columbia). Some other advice on the Bare drysuit: don't waste your money on the Rock boots. The darn things, if your feet are as large as mine (11 & 1/2), don;t fit into any of the split fins I own (including XXL Twin Jets). Turtles were the only thing that fit, until I tried going without the rock boots, instead putting a really large pair of wetsuit booties over the feet of the drysuit ... works like a charm. If I had to do it all over again I'd probably get the built-in boots on the drysuit.