They have illustrations of their bars with the various measurements.
i also went with the k werks narrow 2 plus 2..definately higher but the difficulty is figuring out how far back to pull them... i set on bike.. felt perfect..tightened down , put back together, and have lived with them for year now...much better... however.. doing it agin, i would have pulled them back another inch or 2 for a little less reach.... just so hard to get any bar perfect for anyone, but if u go higher u are sure to have a better feel than any of the stock bars...these bars are marketed as 2 plus 2 over stock but do not tell u where to position them to achieve those measures... frustrating.. my advice is pick a bar u like the looks of that are higher and just start there...