This is the San's dagger from the movie, "Princess Mononoke".

I modified the dagger files from cyancdesign's
"Kunai - Full sized, anime style" to be slightly larger. And I made a new handle for it using TinkerCad, because San's dagger doesn't have the ring of a regular kunai.

However, the handle does not have the peg holes of the original. It is a solid piece of ABS for a little bit of heft. I simply glued it onto the rest of the dagger.

The final measurements are about approximately 12" long and 3" wide (at the widest point). The first picture shows it on a board of 1x1 inch squares.