Metal : High quality 18 Gauge M Steel Inner Diameter : Front to back 8 inches (approx) Ear to Ear : 7 inches (approx) Height : 15 inches from top to bottom (approx) Circumference : 25.12 inches (approx) Size : standard size, fits almost all adults Other : Please use Helmet cotton cap for comfortable wearing, and use Helmet Stand for the good protection of helmet. We supply this helmet pre oiled for protection from rust. Use this helmet as a great Halloween costume. High Quality Museum Replica totally Hand made, Lowest Price