Hey girls, I'd like your input. When ordering European shoes, I've always added "30" to my US size, which is a 6.5-sometimes 7. However, when ordering the Chanel cambon ballet flats yesterday, I was told by the SA that you should always add "31" to your US size. This also conflicts with what the Neiman's size charts state as well. I've heard the cambons run small. So my question is, do you add 30 or 31 to your US size? The cambon ballet flats are not available in half sizes, so I need to go with either a 37 or 38 and I just want to make sure I order right.