Supplies needed: paper & scissors
Cut a piece of paper into a rectangle, it doesn't matter so much about the size.
(Don't make it too small or too big , about the size of a us dollar bill)
Fold the bottom edge up, so that the crease is about 1/3 of the way up the bill.
Turn over the bill. The end closer to you should be the doubled over section. Make a crease down the center lengthwise. Then fold in the sides to meet the center line.
Fold the bottom two corners outward like shown below with the dotted lines. Your angle doesn't have to be exactly the same as mine. The right-hand picture shows a close-up of what it should look like after you make the folds.
Turn over the bill again. Fold the top edge down about 1/4" (about 1/2 cm), like shown below with the dotted red line. The right-hand picture is a close-up of what it should look like.
Turn over the bill again. Fold the top two corners in diagonally, like shown below with the dotted red line. Don't stress over the angle, just make sure the corners meet the center-line.
Fold up the bottom edge and tuck it under the collar. And then you're done!