If you know your European shoe size then just ignore the US conversion because the conversion is wrong. My European shoe size is 36 and I wear US size 6, where as the chart says it's US 5. If you don't know your European shoe size, then yes, do what other reviewers say and order a size down.
Anyway, i love how these shoes look. They're very elegant. They make my feet look slender and longer (which i love because I hate shoes that make my feet look smaller than they already are). And of course they're very comfortable to wear which is my number 1 requirement. I guess the only thing I don't like about the shoe is having to deal with the buckles whenever I put them on. I'm used to just slip on my shoes and be done.