You will need:
Either a simple rectangle/square shaped bag you have made, or a premade bag to make it even easier.
1 hair elastic
1) Find the middle of the back, and sew a hair elastic in place with a few straight stitches back and forth.
2) Turn the bag to face front up
4) Fold one 3rd of the bags side in on itself
6) Then start rolling from the bottom and find where the elastic will stretch to.
8) Fold back up and secure with elastic around the button.
And you’re DONE!It's that SIMPLE!