More than 51 inches long (130 cm) fully opened. 27 inches in closed position. It is shown below next to a “normal” size 10 inches Navaja knife. Probably a late 18 C. piece. Blade 25 ˝ inches. The handle brass decorated with round holes and pierced bone panels. Very good condition. Old age patina on the blade. The catch holding the blade in open position is a bit loose. A rare and outstanding item.