I will use them to go out in a more formal and casual style. I'm a good size 10 and just ordered a 10.5 but sent them back for a 10 and they fit great, neat. I love how comfortable they are right out of the box. The gray variant is perfect for many outfits and goes great with jeans. From conference work, hours of strolling around the Smithsonian, or something more formal like fine dining or a trendy nightclub... maybe even a masquerade ball at a secret virginity-sacrificing location... to many movies. Enjoy it.