Sterling silver round signet ringSterling silver signet ring for men and women This ring is handmade, we design it in Rhino, print it in wax then cast it, after casting we clean and polish it then it is ready to go. for make it affordable it is hallow at back. Detail: Material: sterling silver size of the top circle: 12 mm Sterling silver is a type of silver alloy that is 92. 5% of its weight in silver and 7. 5% of its weight is another kind of metal that is usually copper.