Item: Tiffany & Co. X-Ring Size 8. Description: 9 Mm Width 18K Tiffany Ring With Signature X Design And High Polish. All Kmk Luxury Consignment Merchandise Is 100% Guaranteed Authentic! Est Retail: $1,350 Size: 8. Can Be Resized By Any Jeweler. Hallmark: Tiffany & Co., 750, 1990. Condition: Pre-Owned With Minor Surface Scratches.