Download the Mandalorian template, print, and cut out the pieces you need.
Take the top line of the helmet and glue it in between the 2 vertical lines at the top of the helmet.
Next, glue the t shaped, center of the helmet in the middle, just below the horizontal line.
Finish off the helmet by gluing the sides of the helmet to both sides of the bottom of the helmet. Trim off any excess paper that hangs off the sides.