This Buch Roman Helmet was the helm of roman cavalry through the 1st and 3rd centuries. Made of pure 18 gauge polished brass by Deepeeka, this is an authentic replica based off of historical research. The Buch Helmet was named for its finding place, the Roman auxiliary cavalry fort of Buch, which was on the Limes Germanicus or Germanic Frontier. These Roman front lines divided the Roman Empire and the Germanic tribes from 83AD to 260AD. This helmet is fully wearable and functional and perfect for reenactments, role-playing, costumes, and is a must have for collectors and historical enthusiasts. Due to the hand-made nature of this item, slight differences in size and finish can be expected, making it a truly unique one of a kind collector's piece. The inner circumference of this helmet varies slightly, but is around 23 inches.