The avatar component is a circular user photo used in multiple locations throughout the control panel. The avatar component comes in 5 sizes.

Size Class  
Default .avatar width: 30px, height: 30px
Extra small .avatar--xs width: 14px, height: 14px
Small .avatar--sm width: 24px, height: 24px
Medium .avatar--md width: 50px, height: 50px
Large .avatar--lg width: 70px, height: 70px