This morion is a reproduction from an original around 1600, manufactured from steel and brass.
Although it is mainly meant for decoration it can well be worn if the rivets/screws are covered up and padded.
Inner size (from ear to ear): 18 cm / 7 inches, length from the collar to the top of the helmet 39 cm / 15.3 inches.
The riveted ornaments and the plume holder are of brass. The additional face protection seems not to fit exactly and the leather straps are too long.
Weight of helmet: 3.8 kg / 8.4 pounds, material thickness 1.2 mm / 0.004 inches.