Because unlike a lot of other online shoe stores Shoe Envy has "physical" shops, we are able to interact directly with our customers, collecting information and feedback on the fitting across various styles of Blowfish and their sizes. Although intended as a guide, we feel you will find this information very useful when choosing your Blowfish Footwear. If you are still unsure about the size you require then please dont hesitate to call our experienced customer services team on 01747 898010 and we will help you with your Moda In Pelle.