shankbone

I have this small, hardwood katana. It measures to about 55 centimeters or 22 inches from the tip to the bottom of the handle. I don't know a lot about classifactions of swords, but I believe this is about the same length as a wakizashi samurai sword. So do I call this a wooden wakizashi or something else? It doesn't matter all that much but I'd just like the correct name.