The Amphitrite cobalt chrome ring measures 4mm wide and has a traditional style constructed with cobalt chrome. These mens and womens cobalt rings feature the classic style of a flat design in cobalt. As with all cobalt bands, this ring features a comfort fit interior for ease and wear ability. As a white metal just like platinum or white gold, cobalt chrome truly is the perfect metal. Most sizes ship within 2 - 3 business days. Free Lifetime Warranty and Lifetime Sizing; pay no restocking fees or deductibles!