This set of three 18 K yellow gold stacking rings are great worn together or separate. They are stamped on the interior of the bands with the gold content as well as a maker's mark. The rings features a central band of colored enamel in red, blue and green. All of the rings are a size 8 and weigh a total of 8.4 grams. They are 2.5 mm thick. Please take a moment to view the photos and check out the rest of the items in the shop. I update items frequently.