I'm 6'3" as well and still debating between the 13 and 15. It's hard to compare their height to other windshield since they rack forward so much more than the factory ones.

QUOTE=AWILLIAMS64;159161]I just bought a used madstad that is in perfect shape, but it has an 11" on it. I am 6"3 so I may have to go up to at least a 13 maybe even a 15. Things to find out after the purchase...lol. I will have to try it out first to see. I currently have the baggershield and I like it but the passengers are still getting a lot of buffeting. So is the general thought that I would need a 13 or 15? I have stock seat and have no plans to change as of now.[/QUOTE]