The most popular length for men's necklaces ranges from 20 to 24 inches. This length allows the necklace to lie comfortably on or just over the chest. It's adaptable and flattering on a variety of necklines and body shapes. The appropriate length, however, might vary based on personal desire and style. Shorter necklaces, approximately 18 inches in length, give a tight fit and are frequently preferred for formal settings, but longer chains, around 24 inches or more, offer a more relaxed, bohemian appeal. Finally, the length of the necklace should correspond to the individual's taste, fashion sense, and comfort.