sz6.5 David Yurman 18k/Sterling Diamond Chervon Chalcedony ring 12.2 grams, approx .35cttw natural vs2 diamonds. Top of ring is 20mm x 11mm. No issues. Guaranteed authentic. Most rings are shown on a a ring sizer in the pictures and the size is typically given at the beginning of the title and description. Women's Size 6 Ring.