Tiffany & Co Ring Size 6.5 Tiffany & Co. - a note ring, comprising of a thick D-section band engraved with 'Tiffany & Co.' in cursive script, signed and marked 'AG925' (which means sterling silver). Ring size: 6.5 , the diameter of the ring is 17 mm if that helps. I can squeeze it on my size 7 ring finger. This is a silver ring, the lights in my apartment are very warm, so it looks gold but its in fact silver. I tried to color correct on my phone, but only got so far.   NEVER WORN! This was a graduation gift in 2013 and it's been in its Tiffany box ever since. Please give this lovely a new home. This comes with it's original Tiffany & Co box and jewelry bag. Low price because I don't need this, its literally been packed away for a decade. Questions? Leave a comment below!