A Pigman is a Pig in a humanoid form. Although not implemented, their skin can be found within the game files, and their counterpart, Zombie Pigmen, have been part of The Nether since the Minecraft Alpha 1.2.0 Halloween Update.
Credits go to Mojang for making it. I only made it in a papercraft figure.
Info About Pigman: http://www.minecraftwiki.net/wiki/Pigman
1. Click on the papercraft design image.
2. Make sure it has not been resized by your browser (you might need to click the image again).
3. Print using your browser's Print function.