Guillaume This unique skull ring is a true work of art, featuring genuine 18-karat gold earrings, characteristic of Guillaume. The Guillaume "G" mark is engraved on the skull's forehead, and the inner side of the ring is stamped with "K18 925". Size is 17. No accessories included. This is a used item, so there are some minor scratches from use, but it is still in good condition and can be worn beautifully.