3 Sizes Available -- Totally 6 sets ring base findings in 3 sizes: tray 1: 16mm, glass dome in 17mm inner diameter; tray 2: 18mm, glass dome in 15.29mm inner diameter; tray 3: 20mm, glass dome in 17.28mm inner diameterAdjustable Ring Size -- Our ring base components measure about 17-18mm, they can be adjusted to fit most finger sizes, so you don't have to worry about stocking up on multiple sizesReliable Material -- These round ring settings are made of 201 stainless steel with shinny surface, durable and sturdy, lightweight and easy to preserve. It is recommended to avoid contact with water during use to prolong the service lifeDIY Jewelry -- You can stick all kinds of decorations you like on the finger ring pads, such as lovely logos, resin, dried flower petals, pearls, crystals, cameos, gemstones, small beads, etc., and then glue them to create a unique style of ringApplication -- Designed for use in jewelry. The pendant sets also as a great handmade gift for your family, friends, you can diy your own and unique gift for Christmas, Thanksgiving, Mothers Day, Fathers Day, Valentine's Day