I would find a bike shop and try some on. I'm a women's size 7-7.5 but have possible neuroma and need wide shoes - I bought a men's 40 and LOVE them. They may be too loose for racing, but I can tighten them adequately when needed. I've had them 4 years and I just finished the 2011 RAGBRAI in them. I also put a custom shoe bed in them that requires me to go up in size too - keep that in mind and try on shoes with any insert you plan to use...I don't even want to think about another brand of road shoe.