This helmet is constructed of 20 gauge polished steel with brass edges. The adjustable chin strap is leather with a brass buckle and scales.ÿ The strap is riveted to the side of the helmet and is decorated with a brass clover with 3 crosses and a red, black, and white plate behind it on both sides. The top comes with a removable spike and the inside has an adjustable Rexine lining.ÿ This helmet comes oiled to prevent rusting and prolong the life of this helmet. Internal circumference: 25.12 inches. Overall Length 12.50 inches.