I'm on my twentieth pairs of Birkenstock, including 4 of this model (Madrid). And the quality is there! I never had a sore foot! I chose this one in blue is a beautiful blue! They take well to foot, do not hurt at all. I put on the 38 and I have to take the narrow 38 (38EU). Anyway I got to 50% cheaper, thank you Amazon !!! Delivered very quickly, packaged well ... I recommend the brand Birkenstock, they can take years, there is great inside. I no longer wear it in the summer and at home. In Winter for the house I chose the Birkenstock boston (wool hoof), always of course balance, otherwise quite expensive c. There.