Japanese Anime "Demon Slayer": Agatsuma Zenitsu Sword. Superb Material: This Demon Slayer sword made of high-density foam, sturdy and will not cause any harm, it is the best safe choice for cosplay. Standard Size Length: 40.9 inches; knife length: 29.99 inches; handle length: 11 inches; customized according to ordinary standards, it is the best role-playing props.