Men's Aquarius Charm Necklace on an 18K Gold Filled Rope or Figaro Chain Chain Thickness: 2mm Chain Length Options: 16" Women Small 18" Women Medium 20" Men x-small 24" Recommended Men Size Price per Necklace Lux men’s statement pieces designed to wear alone, layered, or enhanced with our collection of charms! Sleek and timeless pieces made to become his favorite go-to accessory. Make this the perfect gift for him! Material: 18 Karat Gold Filled, Hypoallergenic, Nickel-free 18 Karat Gold Filled does not de-laminate or peel like Gold plated Jewelry nor does it tarnish as readily. Generally speaking, gold filled is better quality and will have a much longer lasting color than plated jewelry. To clean gold-filled it is best to use mild soap and water.