Big Skull Biker Stud Earrings — .925 Sterling SilverAt 13mm x 17mm, these are the biggest skull studs in this collection. That extra size does two things: it makes the skull visible from across a room, and it gives the silversmith enough space to carve real detail into the face defined cheekbones, separated teeth, deep eye sockets that catch shadow. . 925 sterling silver, stamped on the back, polished finish. Just skull, no crossbones, no stones, no extras. Wear This If If smaller skull studs don't