I'm 5' 11" and wanted to see over the top of the shield so I went with the 15" with their mounting hardware. The top of the windshield is about even with my nose and most of the buffeting is above my face shield (full face helmet). Overall, I'm happy with the shield. If someone local to you has a Gustafsson shield I would try to see if you could meet them and actually see it on a bike.