Sur shoes are produced entirely in Florence, Italy, and in a partially handcrafted process, with leather materials sourced locally in the district of Tuscany. The firm where they are produced is Fratelli Masotti --- a firm owned by the mother of the sisters Raveggi, Beatrice, and Cecilia --- a firm that has worked for years chiefly in the fashion industry for famous brands such as Jimmy Choo. The firm was founded by our grandfather, and we sisters practically grew up there, playing with adhesive and bits of leather since we were children.
Different countries use different shoes sizing standards. Sizing can also vary depending on the manufacturer. Sur follow Italian shoe sizing standard and the table below will help you convert it into your size.
Overall Sur shoes run small, so if you are between sizes you will most likely need to go a half a size up as opposed to down, i.e. if your street shoe size is 7.5 you will most probably be a size 38 in Sur.
Overall, please remember that all dance shoes stretch out and if you purchase a size larger than what you need it can become a problem in the future after a few wears. A dance shoe should fit you like a glove and if you are able to stick a finger in between your heel and your shoe's heel cage, then you are definitely wearing a wrong size of tango shoes.