Item #: 314048 This is an authentic CARTIER 18K White Gold 4mm Happy Birthday Band Ring in a size EU 51, US 5.75. This ring is designed in 18 karat white gold and has the Cartier logo engraved all around. This is an elegant ring with a distinctive look, only from Cartier! Follow this item for alerts. Cartier is a registered trademark of Cartier. FASHIONPHILE is not affiliated with Cartier.