What is the smallest earring stud size?

The smallest earring stud size varies from maker to maker. Some jewelers offer stud earrings as small as 1.5 to 2 millimeters, though these smaller sizes tend to be best for wearing in ear piercings other than the first hole. As a result, makers may choose to start their sizes at anywhere from 3 to 5 millimeters. On 1stDibs, shop a wide variety of stud earrings.