For men, boots will generally match the same size you wear in dress shoes. For ladies, note that Chisos boots are slightly wider than other boot brands. The best advice is to order the size that you wear most often. Another rule of thumb is to order a half size smaller than what you would wear in running shoes. So a size 11 in sneakers becomes a size 10.5 in Chisos.Take a look at our video guide for how to size your cowboy boots! And remember, exchanges are always free in case you want to try a different size.