I'm a smidge under 5'2", but with short torso. I run a 500ish ett on both tourer and roadie, and the 42cm Surly LHT fitted (bit high in front though, and heavy as a % of body weight). Another my height, but with short legs, is quite happy with a 510mm ett. If you're looking at cx bikes, keep an eye on the standover, given the BB height.