The point is not the size, but the shape of the ear. Choose a shape that has enough room to fit the earring. Like, a square earring is a good choice for round or heart-shaped ears. Another issue is the size of the ear itself. Try to find out what size earrings you have; this will help you avoid getting earrings with a size that would make it difficult for you to wear them. It is recommended that you use earring studs that are removable so that you can remove the earring in case of an allergic reaction. Earring studs are supposed to be very comfortable; this will help you wear them for long without feeling any discomfort.