10.5x15mm Sterling Silver Cross with Cubic Zirconia in Micro Pave Setting. The opening in the back is 3mm at its widest point, but may be able to fit larger cord or chain depending on the shape.

This item has multiple layers of plating on top of a 925 Sterling Silver base to limit color changing. The sterling silver base is first plated with copper, which helps the final grey rhodium layer stick better. It is then finished with a 1-3 micron outer layer of grey rhodium, which is very thick by industry standards.