Mother-daughter stackable birthstone ring: Each cubic zirconia represents the month of birth. The oval birthstone ring represents the mother, and the round birthstone ring represents the daughter. Mother and daughter rings can be stacked on top of each other to form a family ring set. Meaningful birthstone rings: You can choose the right ring for your needs, if you have two daughters, you can choose two round birthstone rings and one oval birthstone ring to form a stack ring set based on the month in which you and your daughter were born. Material: Made of 100% 925 sterling silver and cubic zirconia, does not contain any allergic element, is lead-free, nickel-free, cadmium-free, and hypoallergenic. Idear jewelry gift: Perfect jewelry gift for mother, nana, grandmother, or wife, on birthdays, anniversaries, mother's day, Valentine's day, or Christmas. The Birthstone Stack Statement Ring set will make you stand out anywhere. Size: US 6/7/8/9/10#, you can choose the size that fits you based on your finger size. Mother Daughter Rings are well packed in a delicate gift box. We are committed to providing unique luxurious quality jewelry. If you have any questions about our product or our service, please feel free to contact us, We will assist you to find a solution promptly.