Beauniq Childrens' Sterling Silver Rhodium Plated Rosary Chain Necklace, 18" Unsure what length chain to buy? 18 inches is the standard length and will look great on most people This necklace is made of solid rhodium plated sterling silver and stamped "925." The necklace is made of lightweight hollow sterling silver beads strung on a solid sterling silver chain. Necklace itself is 18 inches long, plus 3 inch dangling part with cross. Cross measures 12mm (0.47 in) x 6mm (0.24 in), beads on the chain are 1.85mm thick.