Two tier Navajo pearl necklace. The Navajo pearls are 4mm on the necklace . They are 3mm and 4mm on the charms. The charms are wire wrapped in sterling silver. The pearls are sterling silver - not plated. This necklace is approximately 16 inches long with a sterling extender chain that allows you to wear it up to 18 inches. A wire wrapped 4mm charm hangs at the end of the extender chain.