My first passenger was a CFI who flew at the time a single place Pitts. He was 250 lbs. I am 240. He, being a Pitts driver, was impressed with the flying qualitities. We were shoulder to shoulder but not uncomfortable. My brother is 6 ft 4 in. and he has flown with me in the Kitfox.In fact I believe the Kitfox is more comfortable than the RV-9A that I am flying.