Adjustable Ring Base Blank: about 17~18mm in inner diameter as standard but can expand. These rings are adjustable to fit most ring sizes, so you don't have to worry about stocking up on multiple sizes. Material: stainless steel, you don't have to worry that the ring tray is not fit enough, the ring is smooth and not easy to scratch your fingers Flat Round Stainless Steel Pad Ring Setting: about 17~18mm inner diameter, 3~5mm wide, tray: 6/8/10/12/14/16 mm inner diameter Easy to Use: The synthetic turquoise cabochons, then cover the cabochons on the ring pendant tray, and then the unique finger ring is finished. Suitable for many OccasionsThis ring is fabulous, use it for everyday casual wear. It's look very elegant and can wear it for day time or night time