Hello Deborah, I'm 5'10" so I got the 14" windvest. I decided on the height based on the threads in this post, and also on the recommendation of the gentleman that I talked to when I placed my order. I really like the thing, easy to install, when you specify SPEEDMASTER, the thing will come with the notch already cut to accommodate the Speedo. It helps my ride out alot, the bike picks up faster at higher speeds, and my mileage has gone up a tad, or it would have, if I'd just let off that evil throttle. EVIL!!
