Our designs accommodate a standard "B" thru "EE" width foot. We recommend a "EE" or wider go up 1 full half size (0.5) to allow the Uppers to form fit accordingly. Women go down 2.0 full sizes since they are labeled to a Men's size scale. All our styles feature a roomy Toe-Box with exaggerated fit, which facilitates "comfort to the tee" right out of the box. These styles also accommodate aftermarket gel & other Orthotic insoles for feet with special needs. OEM inserts are removable with a latex heel cushion topped with combed mesh for added coziness. These inserts set over a molded EVA foot bed also with a latex top layer.