Inner Diameter : Front to back 9. Use this Helmet as a great Halloween Costume. The item "Antique Corinthian Helmet Vintage Collectible Decorative Fully Wearable Larp SCA" is in sale since Saturday, October 5, 2019. This item is in the category "Collectibles\Knives, Swords & Blades\Armor & Shields".The seller is "medieval*manufacturer" and is located in ROORKEE, UTTARAKHAND. This item can be shipped worldwide.