Old denim pencil case - free sewing pattern

There are many ways to reuse your old jeans and here is one.

Materials:
Cut-off old jeans part
Scissors
Sewing machine
Velcro tape
Measuring ruler
Tailor's chalk

Cut off and keep xD

Make 2 pieces like these.

After oversewing, face 2 right side up and sew the ------ together. Turn over then sew parallel lines of the flap part.

It will look like this

Very fast and easy upcycled project, right?