Measurements:

Medieval Armor Gladiator Helmet Maximus Mild Steel Helm With Leather Strap Black

18Ga Steel 

Material : High quality Steel & Leather

Inner Diameter : Front to back 9 inches (approx.)

Ear to Ear : 8 inches (approx.)

Height : 16 inches from top to bottom (approx.)

Circumference : 26 inches (approx.)

Size : Standard size, fits almost all adults