Chainmail hauberk, Earl grade 60" chest - code 4. Chainmail hauberk (mid-thigh/half sleeve) 60" chest size in Earl grade mail, featuring flat ring construction with dome riveting. This code 4 hauberk (flat ring, dome riveted) lacks the total Authenticity of wedge-riveted mail but nevertheless provides excellent protection. Size: fits up to 54" chest size measured over a gambeson and undergarments. Construction: dome head riveted. Ring type: European flat ring. Material: 17Ga. Mild steel. Finish: natural. Ring internal diameter: 9mm. This style of mail is reasonably authentic to the early Medieval period. This construction style has the advantage of strength, allowing it to be used for supervised weapons-contact re-enactment. Construction is in the 4 in 1 pattern.