There are many different types of men's formal Oxford shoes. The most popular are the penny loafers, which are a classic style that has been around for decades. They come in many different colors and designs, and they're very versatile. They can be worn with pants or slacks, or they can be worn with a suit or tuxedo. They look great with almost any outfit, but they're especially popular with jeans and khaki shorts. There is some versatile collection at https://www.brunomarcshoes.com/collections/oxfords site which you should check. Men's formal Oxford shoes can be purchased online or at local shoe stores where you live.