Brand: Tiffany & Co. Name: Tiffany & Co. Half Circle Channel Setting Ring Common name: Half circle channel setting Material: Platinum 950 Item rank: Used item A Category: Ladies Size: No. 12.5 Actual size: Max Depth: 2.2 mm (0.09 in) Stone used: Diamond Weight: 3.3 g Accessories: (no accessories) Detailed Polished. No cara. • Ring size listed will usually be international sizing, not US, unless otherwise stated. You accept this description upon purchase. Please use the Ring Size Chart.