Dogfish Doug
Contributor
Not to hijack but my MK1 & MK2 are XL - so would I be correct in thinking (here goes my ego) at 5'10" and 225 lbs I'd be looking at the 2XL Fusion to allow for undergarments (I'll be getting a MK3 soon for winter diving).
Hey Brian, if you do plan on getting into an MK3 I would recommend a 2xl for the measurements you have given. However your best bet would be to drop into your local dealer and try one on with the MK3 just to make certain.
Doug Maynard
Whites Manufacturing