If you need to determine what your ring size, request a Free BVLGARI Ring Sizer and they'll mail one to you at no cost! The sizes shown on the loops are European sizes, corresponding to the ring sizes shown on the Bvlgari website. The ring sizer ranges from 45 to 65. Click here then click "REQUEST YOUR RING SIZER" to send your request and receive the Bvlgari Ring Sizer directly at home.