These versatile birthstone eternity bands are fabricated using 1 millimeter thick by 3 millimeter wide solid Sterling Silver. You choose your custom selection of birthstones and quantities of each with instructions in notes to seller or choose one particular gemstone to be set throughout the entire band and I take care of the rest. The 2 millimeter round lab created gemstones are securely gypsy set. One band can hold from 8 to 12 gemstones depending on the ring size. High quality, fashionable and stackable.