This coif features 16 gauge links in the "international" pattern - 4 links through a 5th - common to all European mail. Faithfully copied from examples in museums and private collections, it can be worn with or without a helmet. Outer link diameter of each link is about 7/16Œî, inner link diameter about 3/8Œî. We recommend keeping this butted steel mail oiled at all times. Express delivery not available on mail. Made by Windlass SteelcraftsŒ¬. Order your Mail Armor Coif (head chain mail) from Museum Replicas and let Movie Replicas Direct deliver your protective head mail in the next few days!