We needed some masquerade masks for a gala :)
I made some researches and found an interesting example which I partly vectorized.
You can lasercut/engrave one in heavy colored paper, or print one in 0.5mm or 1mm height (0.5mm was to have only one layer and thus a quite flexible surface when still warm).
Or you can even print it on a 2Dprinter and then cut it with scissors.
Looks even better when using "hilbertcurve" as bottom layer pattern.
Add two holes to pass a string (if you wear glasses just add two tack of sticky paste on the corners)
Wear in style :)
(Optional : you can easily make a hat with a big sheet of paper http://flic.kr/p/avNGNA )