Size medium by Slote & Klein. The leather is excellent and supple and has "USN" stamped into the leather at the rear. The chamois lining is wonderfully clean as the helmet has evidently never been worn for use. Fully labelled. Retains silk drawstrings. Good strap (light surface cracking in places) with chocolate brown velvet pad. No facilities for oxygen equipment. Excellent, very lightly used / probably unissued helmet. A beautiful example. Stock code H14450.