Machine sew the three sides of the rectangle together on both pieces of felt.

On the felt that is going to be the outer color of the purse try and sew on the drawn line.

For the felt that is going to be the inside of the purse sew about 5mm inside the drawn line.

Trim away the excess felt around the two purses. Then turn the outer purse right side out but leave the inner purse as it is.