How about an all American 14 square? (no metric metres here).
14 feet long, max 14 feet wide and max 14 x 14 = 196 sq feet of sail.
Forget about fair. At a skinny 220#, 14 feet aint gonna be fair to me 80% of the time, but I wont complain.
Seriously, this is a good idea, because there are some radical hull shapes that work only on short, high volume hulls, so this may be an oportunity to make a shorter,cheaper,kinda gentler, fast enough boat to revive sailing.
Also, cheaper and easier allows quicker development, (like electronics).
I'll further bore you with my favorite joke now. "If Mechanical Engineering had advanced as fast as Electronic Engineering, you could buy a Rolls Royce for two cents, and it would be the size of a matchbox". (yes, it is relevant to the thread)