Start out with any t-shirt you would like to cut up.
Step 1: Cut The Sides
Cut the sides of the shirt all the way up the side and even the sleeve. Make sure the cut is as straight as it can be, the only thing that should be still stuck together after this step is the neck of the shirt.
Step 2: Cut Strips
Cut about one inch strips all the way up the side and even the sleeve.
Step 3: Tie the Stips
Tie the strips into knots, like you would tie a shoelace or string into a knot. (don't pull too hard but make sure its tight enough so the knot won't fall out). Do this step to both sides of the shirt.
Step 4: Cut Neck & Sleeves
Cut the neck as big as you wish and cut the end of the sleeves off of the shirt. Design or make unique for your liking. The rest is yours to decorate how you would like.