Drops of Love Stacking RingsStacking rings are a powerful accent piece and reminder of your love for your baby and breastfeeding journey. The breast milk stone is 5mm. Simple and elegant on it's own, or stack them together to represent multiple children or memories. Pricing starts at $170 for one ring (sterling silver) purchase 2 or more stacking rings and save 25% (using the same preserved milk)! Each ring can be customized individually with different shimmers and color tints.