I ordered the 8" black Klock Werks windshield today.

It should be here Tuesday

However it may be awhile before I get a chance to test it. I was torn between the 8" and the 12". I couldn't find any pictures of the 12" to try and gauge where it is going to sit as far as my eyeline. I emailed John from Klock Werks and here is his response.
Me
With your new windshields and the curved top what would be your best guess as to what the curve may simulate height wise. Ex. does a 8" curved windshield simulate a 10" standard windshield, or does the curved top and contoured shield offer even greater protection.
John
Mike, the windshield offers greater wind protection than a standard 10” windshield. I am 5’11” and test ride our customer’s bikes with the 8” and have no wind issues wearing standard sunglasses, the wind is moved around the “hips” of the windshield and then off the lip up and over your head, on me it hits about the top of the helmet.
Me
I have seen a couple of bikes posted with Klock Werks windshields on them, most common is the burnt orange/red bike and the blue bike with silver stripes. What size windshields are these bikes running?
John
Mike, those are both 8”