Need a fierce weapon for your caveman costume? Carry the Animal Skull Bone Knife on Halloween and there will be no doubt that you could've survived in the Stone Age! This gray knife looks like it was carved out of bone and features the skull of a horned animal. The knife measures approximately 16 long and 6.5 wide and will add a touch of authenticity to a caveman or cavewoman costume. Go back to prehistoric times with the Animal Skull Bone Knife!