5 B, and these fit well. Fast delivery ! Volume and mute fuctions on cord. Seriously can amazon get any better?! 5 sometimes a 10. Two major issues with these. 3) The leveling glides are great to have but definitely not long enough. Second; One clog is not lined while the other is winter fleece lined. Very practical product anyone can use it. The sizing was good and I liked the overall feel of the shoe.