I inherited the mask from my Grandfather. He traveled in Africa in the sixties and Fifties. I have own them for thirty years. They are made of wood with some type of grass Mayne around the exterior some horse hairs around the mouth for moustache. Protruding eyes large nose and teeth. Large at the top than the bottom. Not machine made. They are holes at the back that seam to have held a harness to whereas a headdress.
The large one 15x12, the small one 12x8