You will need:
Duct tape and scissors
There are many ways to make one of these. I have found they come in quite handy when I need a container for letterboxes. I tried to make them simple. No measuring. Just cutting and taping together.
Step 1: Starting
First cut out a strip the length you want your pouch to be. Make sure you are leaving room to cut off excess on the top and bottom later on. Its better to make it longer and cut off more then have it to short and need to start over. Cut another piece trying to keep the same length. Place that strip over the sticky area of the first strip. Remember sticky sides always together. Set aside and repeat getting two finished strips.