My first bike was a Trek WSD design, and it was just too long for me. Perhaps if they had made it a size smaller it would have worked, but the proportions did not work out right. My beautiful steel steed is not a WSD design and while we did have an expensive conversion to fit it to me, it had nothing to do with the reach. In that department the bike fit me fine.

I am 5'3" in my stocking feet and, at least so far, mens/unisex frames have fit me best if I can find one small enough. I am long-legged for my height but my arms do not seem to be all that short. There are differences in how different manufacturer's measure their frame sizes though, nothing replaces test rides if at all possible. That can be a challenge sometimes, but nothing replaces testing them out.