I purchased 13W (wide) and the label on the shoes says indeed 13W.  My foot is regular in size, just a little bit wide so I decided to take the wide size.  The shoes are so narrow, it is incredible, narrower than a normal shoe!  Moreover, I expected the material to be leather, it says "upper leather and simulated leather" on the shoe, it feels like faked leather rather than real leather.  Not happy with the shoes, unfortunately.