authentic Versace Virtus gold tone metal Medusa head ring
Size: 8.5 US / 19 IT - New in Box
Bought from a Versace boutique in Italy. I have the receipt.

Italian size is 19, which is equal to US size 8.5 and UK size Q according to the size chart at Versace website.
Diameter: 18.9 mm = 0.75 inches

Lead & Nickel Free
Hypoallergenic Materials
Made in Italy
Comes with original case and tags