What to do?
Download the templates http://www.fps-x-games.com/2013/08/minecraft-large-printable-iron-sword.html and save to your computer.
Print Out the sword templates. I used glossy photo paper for the blade and matt card for the cross-guard and grip but its up to you.
Cut the Minecraft sword out.
Fold all the tabs and guidelines.
Before you glue be sure you understand what parts go where and once you're happy go ahead and glue.
That's it. I've made the templates as self-explanatory as I can so good luck and enjoy.