Go to your favorite thrift store and look for a size 18 months or size 2 little boys short sleeve button down the front cotton shirt. Sew up the button placket about two or three buttons, leaving room to get your hand in and out easily. Then lay the shirt out flat so the side seams of the shirt are the sides of the bag and sew the bottom shut.
Sew a little ribbon loop on the center of the back of the collar and put it on a clothes hangar putting the hook of the hangar through the ribbon loop so it won't come off the hangar. Eureka! A darling clothespin bag! Takes all of about 10 minutes.