Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:2225363.

This is the half mask of Kurasame Susya. Its is about 180mm wide and 110mm wide.

Final Fantasy Wiki:

"Kurasame Susaya is a guest character from Final Fantasy Type-0. He is the commanding officer of Class Zero. His nickname is the "Ice Reaper" (氷剣の死神, Hyouken no Shinigami?, lit. Reaper of the Ice Blade). He wields a sword and is frequently accompanied by a Tonberry that carries an enormous knife and also wears the Class Zero uniform.

Kurasame is featured as the main protagonist of the manga Final Fantasy Type-0 Side Story: The Reaper of the Icy Blade, the prequel story of his life nine years prior to the events of Final Fantasy Type-0."