Name: Tiffany & Co. Polished Knife Edge Ring Accessory - SV925 Vintage No. 10 Brand: Tiffany & Co. Category: Unisex Color: Silver Actual size: Weight 4 g, size 10 Material: Main Item: SV925 Specifications: " "Knife edge " " features a design with a thin and sharp edge like a knife blade. Condition: There are some small scratches, but it is in as it has been polished by a professional.