As I mentioned before, my GF is 5' even. When birthday present shopping for her, I looked at the Novara and came to the conclusion that she would not be able to clear the smallest size. Ended up with the 42cm LHT.

Measure his standover and compare it to the frame geometry measurements. While standover is not the only (or even the most important) measure of fit, it may eliminmate some fo the choices right off the bat.