For pleated header styles, like pinch pleat, tailor pleat, inverted pleated box, goblet, and tape pleat, if the curtain finished length is over 108 inches, then the max finished curtain width without seam is 56 inches; if the curtain length is less than 108 inches, no seam for any curtain finished width. Otherwise, the width needs to be double-wide with a vertical seam.
For pleated header styles, like triple pleat and triple tailor pleat, if the curtain finished length is over 108 inches, then the max finished curtain width without seam is 50 inches; if the curtain length is less than 108 inches, no seam for any curtain finished width. Otherwise, the width needs to be double-wide with a vertical seam.