Hey Goose, hate to bear ill tidings but your best bet is to run around and park your arse in every seat you see. a seat may fit your dimensions on paper but be torture to actually sit in, conversley you could be suprised by the fit of a seat that you assume will not fit. i took months doing just that; sitting in every seat i could. i eventually settled on Sparco Torino's, having tried seats from every one of the better companies. they fit me very well; i am 5'11 200lbs with a 33 waist. having said that; my girlfriend is not lost in them and she is 5'6 and about 95lbs less then me... so shop around.