How much fabric to make a fabric covered cornice board 85 inches long?

To make a fabric-covered cornice board that is 85 inches long, you will typically need about 1.5 to 2 yards of fabric, depending on the width of the fabric and the desired fullness or pattern matching. Standard fabric widths are usually either 45 or 54 inches; if using wider fabric, you may need less yardage. Additionally, consider extra fabric for hems and any decorative elements. Always measure and calculate based on your specific design and construction methods.