The brands we carry generally run with the same size as the brands use. Below is a list of which brand use what sizing:
Brazilian - Havaianas
USA - Sanuk, Reef, Toms, Olukai, Hurley and Native
European - Birkenstock, Spring Court, Urge, Walnut, Scruffy Dog and Kito.
We are in the process of updating our size guide for each brand. In the meantime please call the store for advice.