Cycling shoes come in numerous variants: road racing, track racing, winter, casual cycling, touring, off-road or mountain biking, and indoor cycling or spinning. Though many cycling shoe suppliers will have a conversion to American, British, French or even Japanese sizing, most cycling shoes are measured in European sizing. The available sizes range from European 35 to as large as 52. A few cycling shoe suppliers offer selected models wider than the standard "D" width. A small number of custom cycling shoe makers will tailor a shoe to a cyclist's exact foot size and shape.
