I usually wear 6 or 7 in shoes and I got this sandal in a 7. They have an incredibly short battery life. I also tested various other tracks that were converted by different methods and they also sounded true to the original. Estaba contenta con la compra pero en menos de 1 mes con el kimono se le desprendió un listón. They are so comfortable and so pretty. The Birkenstock soft bed is a softer version of the hard cork soles and nowhere NEAR the comfort of the Birki sandles. Its worth watching, but the guy is a pro and when you read the comments you can see that no one is able to do it. Note: I received this product for review purposes. The pink fur is plush and he is able to walk easily and safely in them. Easy to pu helmet on and take off.