Guide on width for single or pair: Single panel: one individual panel of fabric. Made to cover an entire span or as a decorative stationary panel. Pair: Two Equal Parts, 1 left, 1 right. The total width coverage you specify will be automatically divided in 2. Ripple Fold: Drapery is 2x fullness made already, we suggest 1.0 time wide of your curtain track. 200% fabric width is used for wave folds to create the finished width you order. For example, if Your window opening is 10 feet, then...