The White Howlite Skulls have rhinestones around the back of the skulls, and are about half an inch in diameter looking at the profile, and about a quarter of an inch thick from side to side looking face on. The French hooks are Sterling Silver for those of us who need hypo-allergenic materials. These also come with one rubber earring back for each French hook to aid in keeping the earrings from coming dislodged unintentionally. Each item in my inventory is handmade, and each item is one of kind. There is only one of these, as with the majority of my products. The product you see in the picture may, or may not be the one you'll receive when you make your purchase. Ering - 002