Muirenn, thank you for your suggestions. I just ordered my Brooks B-67, yay! I got the regular one, 260 mm length, instead of the S version, 240 mm length. The shop didn't have the regular size, so I need to wait for their delivery. I'm contemplating if I should just get the S version and not have to wait.

Q1: How does that 20 mm length (shorter on S) and 12 mm height (taller on S) make a difference?

Q2: I read somewhere that says the S version is anatomically cut for women. Any truth to that?

Q3: The B-67 has single rail, as opposed to dbl or triple rails. If I don't have a bike yet, how would I know to choose a single rail or otherwise?

BTW: Bill from Wallbike was very helpful and patient with all my novice questions. I did forget to ask the above ones, and am now too embarrassed to call him again.

Thank you!