You can use this adjustable ring mix to make custom rings to wear and give to friends and family. The flat blank on each ring provides a surface to glue cute charms like handmade polymer clay BFF heart pieces, hand-tied bows, beads and other tiny trinkets. Details: Includes assorted colors 8 mm adjustable ring diameter 0.8" x 0.81" x 0.31" (2cm x 2cm x 0.7cm) overall ring dimensions 4 rings Nickel free Iron Contents: 2 gold rings 2 rhodium rings