Credits to Zardium for the idea.
From 1.8 heads have a 3D model and here's how they look like if they're hold in hands.
Heads list: Steve, Alex (extra, not present in game), Creeper, Skeleton, Wither Skeleton, Zombie
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.