This is hand made product. Made of sliver-copper alloy then guaranteed 3 micron gold plated. Longlasting. Just like of pure gold. Best option to give a gift to some you love. Size: 54.00mm / 57.5mm / 61.00mm / 64.5mm Inside diameter Also available in 92.5 sterling silver & 22 ct gold & Pure platinum. Minimum order : 1 piece. Good weatherproof packing for export.