For those looking to cosplay Asuma Sarutobi or Shikamaru from Naruto, these trench knives can be a fun addition to your costume.
Materials you'll need:
Hot glue + gun
Comic backs (or cereal boxes)
Using this template, cut 2 copies of Shape A and 1 of Shape B from comic backs.
Use the same template to cut 4 copies of Shape A from cardboard.
Hot glue together the pieces of cardboard together to form a pair of blocks.
Remove a wedge from the inner side of the blade on each block so it appears to taper into a "blade."
Hot glue the layers of comic backs and cardboard blocks together as seen here. Make sure the finger holes line up.
Glue fill all of the flat edges, including the inside edges of the finger holes.
Use hot glue to give the edge a smooth finish.
Paint it (I prefer to use metallic acrylic craft paints).