FWIW I'm 5' 8.75" and shrinking, and went with a Clearview 18" with recurve in light smoke. Waited over two months for it, and am less than impressed with quality. Yeah it's thicker, so it vibrates less, but mine has small circular (about 1 mm diameter or so) inclusions visible IN the plastic -- kinda looks like tiny water drops. I probably should have gone with their 19". The 18" puts the windstream right at the top of my head when I slouch and on my forehead if I sit bolt upright. My sightplane is right at the top edge of the 18" so I can easily see over it. I also have the extra tall Road King windshield which I got to replace a damaged OEM shield, but haven't got to try it yet. Now I see from various posts that there are taller SERK owners than I that apparently are getting acceptable protection with shorter windshields (under 18") than mine. I can only surmise that this might be attributed to different torso or leg lengths and/or riding posture. I.E. two people of the exact same height might require different height windshields to place the windstream above their forehead.
leoniru