Originally Posted by
soshjosa
5'7.5" and my inseam is around 31.5"
That's just a bit taller than me, and I prefer 52cm ctt, but usually 54cm ctt is what is available. On 57cm bikes I have maybe 1.5 to 2" seatpost showing.
Some people though will tell you it's the length of the top tube that matters rather than the seat tube.
And of course we're all different, so best thing is to try it out yourself and see if you like it.