KNIGHT CRUSADER ARMOUR HELMET Adult Size and It's fully Wearable. Ear to Ear: 8 Front to Back: 9â€³ This helmet is made of 18 gauge steel .full wearable helmet. The Knights Templar Crusaders used this helmet as one of the primary means of armor protection. It has proven its place in history for survivability. A rounded top rim is forged, connecting the rounded top and the sides with rivets. Overlapping layers of steel surround the full 360 degrees of the head. At the front visor are layers of brass laid out like a cross. The design is empowering for a warrior.