If you have a large square scarf, you fold it in half and tie the 2 corners together to form a sling. Play with the knot placement until you get the fit just right. This is what my mother did in the "old days" for a sling for me. She used a pretty silk scarf and folded the elbow corner up and put a safety pin in it. It was comfortable and pretty too. You could make a quilted one but the silk one was perfect for me. It was pretty, cool and it slides nicely against your skin and clothes.