Our most common fit is called regular. It runs true to size and isn’t that super tight sport fit you might find with synthetic brands. It’s for the everyday person, every activity or occupation. We suggest purchasing the same size you would get in a cotton T-shirt or underwear. If you would like your Minus33 to be more fitted, we advise to go a size down, since they are knitted, they have plenty of stretch and should fit fine. For details on sizing, please view our Size Charts page.