Inner Diameter : Front to back 9. Use this Helmet as a great Halloween Costume. Made from : Iron steel with adjustable buckles. (you can adjust size as per your fitting). Look Photos For Actual Image Of Product.This item is in the category "Collectibles\Knives, Swords & Blades\Armor & Shields". The seller is "athena_mart" and is located in this country: US. This item can be shipped worldwide.