Many people spend an entire year planning a Halloween costume, meticulously planning and crafting every detail in exacting precision. Then there are others who don't give it a bit of thought until an hour before the costume party. If you fall into this second group, have no fear. You can easily craft a ninja costume out of a black T-Shirt, and still have one of the more popular costumes (especially if you can find a pirate to battle).
Turn a black T-Shirt inside out if there is writing or designs on it.
Begin to put the T-Shirt over your head, with your face looking through the neck hole.
Tie the sleeves in a knot behind your head, turning the T-Shirt into a hood.
Position the top collar onto your forehead, just above your eyebrows. Roll the collar material under the rest of the shirt to make it less obvious that you have a T-Shirt on your head.
Position the bottom collar beneath your eyes. Again fold the collar material under to hide it.
Pull the bottom section up by your ears, overlapping the top and closing the gap around your eyes to the smallest possible size.