This is my second pair of Reiker Celia Slip-Ons.  I usually wear a US women's 8.5 and the size 39 fit perfectly.  I have these shoes in Toffee and a Grey color and love both.  They are very stylish - I'm always getting compliments on these shoes.  They are great for travel - light weight, easy on and off for the airport, and comfortable for walking.  I have foot problems (nerve damage and aging feet) and had resigned myself to always being the "lady in Nikes" because I was able to get the support I needed from my Nikes and an orthodontic insert.  With these shoes I have found that I can wear something else, look "au courant" and not end up with sore feet.  These are great shoes!