This takes about a half hour to an hour to make, depending on how fast you sew with a machine.
It requires some general sewing knowledge.
Step 1: Ma-freakin' Teerials!
-Tiny bit of duct tape (i used gorilla tape)
Step 2: Cut 1
So start by cutting the bandanna down its center, like in the picture.
Step 3: Cut 2
Step 4: Stiffening!
unfold one flap of your wallet, and tape the inside. Two to three strips of tape should do.
Don't put it too close to the end or it won't hem up right.
Re fold the wallet.
Step 5: Cut 3 and Sewing! (optional Pocket Time!)
hem up and pin the edges into a nice clean hem. If you want a pocket, roll the ends of it into the side hems of the wallet, pin them and continue.
Sew the ends and the bottom of the wallet, i used a nice zigzag stitch on my machine.
You now have a nifty bandanna wallet!