The infamous game against Miami and Jimmie Johnson, the Bills gave out those "life size" door posters of Flutie at the gate and had him listed at 5'10". That must have been with cleats on because I've stood next to him and he couldn't have been more than 5'8".
Also, back in those days I had some connections with the Bills security that would allow me, if I wanted, to hang out down in the tunnel after the game. Flutie would always have a Bills staffer bring his car down to him so he wouldn't have to deal with fans after a game. No other player I saw would do that.