The product 11 was a controlled size above what was needed. So I asked an exchange. Problem, despite the purchase made on the Amazon site, returns costs were in my charge: 7 !!!! I'll be more careful next time and nachèterai henceforth to different stores Amazon (Market place) because they do not have free return contrary to what one might think puisquils selling on the Amazon website !!! Indeed, for my part, it would be normal for the customers they bend to the same conditions for returns.