I think Brooks is the only major producer of leather saddles still in business so that limits your choices unless you're looking to go for something old off ebay. I had a Brooks B-17 Narrow for a short time on a touring bike I picked up at a pawn shop for $30. It was the most comfortable saddle I've ever ridden. Unfortunately it was old and dry rotted from lack of care and the leather split about a month after I got the bike. I'm still debating on the replacement. Many people seem to be very sensitive to the particular model so they may love a B-17 and hate a Professional or vise versa although they are marketed not so much by size as by intended use like touring, argressive riding, handlebar position etc. If you search these forums you'll find some instructions for measuring your sit bones and how to match that to a particular Brooks model.