These Sockwell Happy men's charcoal socks are super easy to use. Just slip them on like any other socks. When it comes to sizing, don't worry about measuring with a tape. Just check your shoe size in the provided chart. If your size is in between, go for the larger one. For washing, you have two options. The easy way is to turn them inside out, machine wash in warm water, and tumble dry on low heat. But remember, don't use bleach. If you want to be kind to the environment and your socks, choose the caring wash: machine wash in cold water and air dry them. That's all there is to it, so enjoy your comfortable socks!