This instructable will tell you how to make a costume that will make you look like this. It is a good project for children and short people. If you have the required materials, it should only take 2-3 hours to make. I am 13 year old but I came up with this idea when I was 7 or 8. It's very simple and if you're in a hurry you can skip the decorating section. I got 2 paper whole food bags full of candy with this costume.

Materials you will need:
Large old shirt w/ buttons. Don't use a tight pullover, it won't work.
Cardboard.

Tools:
Scissors
Tape
Stapler

Thats it. Everything you need. It will make a decent costume, but if you're serious you should check out the decoration section. Happy Halloween!

Step 1: Shaping the Cardboard

This is the heart of the costume. As you might have guessed, human shoulders are not shaped like boxes. So cut off a piece of cardboard with a length that will fit inside the shirt comfortabley, and follow the pictures below. connect the cardboard to the shirt with staples.

Step 2: Decoration Time!

What you need:
Gauze
Glue
Fake blood
Completely optional, but you can also apply fake wounds

1)Unfold the gauze, dribble blood on.
2)Glob on glue
3)smash on gauze
4)streakblood on shirt, roll up, let dry
Notes: Wear something on your head or it's going to be very itchy, and the blood will stick to you hair.