Chanel is a French brand, but is made in Italy. Is the sizing French or Italian? My daughter reliably wears a US size 7 (I can't remember the last time we bought her any other size, but she is on the smaller end for length and the wider for width but still a size 7B.) So would she wear a 37 (assuming Italian sizing) or a 38 (assuming French sizing) in Chanel? Thanks!