If it is 6 yards long than it is meant to be a Sari...which is traditional dress. I have seen these lengths of fabric used as curtains or a waterfall of the fabric from the ceiling as a bed headboard.
Some of the fabrics are silk, others rayon or polyester. They can be sheer to be used as an overdress.
You could make a fancy skirt with the fabric, or maybe an overblouse with a tank top under.