Brand: Tiffany & Co. Condition: A Size: around Material: Pt Platinum Comment Tiffany & Co. Material: Pt950 Size: #12 (12 JP / US 6.5) (Ring Width) 2.2 mm (0.09 in) 3.6 g Introducing Tiffany & Co.'s Together Mill Gray Band Ring. The edge of the ring has a "milgray" design with milgrain processing. The antique milgrain design is cute. It's a simple design, so you can wear it layered. This is a large band ring! It is a large item, so don't miss it. The exact size is between Size #12 and #12.5.