If you know your Brannock device size (the measurement tool you see in shoe stores), order that size. If you don’t know this size, but have dress shoes from other high-end brands, use that size. For reference, see our size chart. Please contact Customer Service if you need a personalized recommendation. All of our shoes are made with a standard D width, however, if you require a wide or slender fit, we might be able to accommodate you: If you have a wide foot, such as an E width, going up a half size should work for you (for example if you are a size 9E, order 9.5 with us). If you have a slender foot, such as a C width, going down a half size should work for you (for example if you are a size 9C, order 8.5 with us).