Battle Ready 4 in 1 Interlocking steel rings are linked together for the strongest sword-proof armor coif. Each steel ring is 10mm in diameter of 8 AWG zinc plated mild steel butted, 16 gauge. Each ring is forged by authentic metal smiths to produce this genuine Medieval Armor Coif. It covers the head (top and back), the neck, and the upper chest area. It protects the body from swords, spears, knives, impact weapons, and projectiles, while still providing full and equal coverage. Face Opening: 9 Inches. Chain Link Ring Thickness: 8 AWG. Fitment: Adult Sizes.  Overall Length: 18.75 Inches.