For pleated header styles, like pinch pleat, tailor pleat, inverted pleated box, goblet, and tape pleat, if the curtain finished length is over 275 cm, then the max finished curtain width without seam is 140 cm; if the curtain length is less than 275 cm, no seam for any curtain finished width. Otherwise, the width needs to be double-wide with a vertical seam.