Cut out fabric into a square shape with the width being a little bigger than desired and the length being twice the desire length.
Cut the fabric slightly along the length side on each four corners of the fabric.
Use fabric tape to fuse cut corners to be permanently folded over.
Create a pocket for the ribbon along but width edges of the fabric by folding over the fabric, create and internal edge on each pocket.
Sew the length edges of the fabric together to create the main pouch.
Turn project right side out.
Thread ribbon through the created pocket.