At PES we use a High quality pressed polished sheet when these sheets come in to us they are 110” x 54” once we allow for our seam allowances the max we get out of our clear vinyl is 108×53. Any curtain over 108” Will require a seam in the middle of the clear vinyl to allow for the width. This seam is standard 2” but can be custom. If the curtain cover multiple openings that equal >108 the seams can be placed on the posts to match the openings and posts of the porch itself. If the seam is not wanted we can adjust eh side cap width to avoid the seam. Keep in mind curtains over 108” in width will either need a seam in the clear (which can be hidden behind a post) or wide side caps to allow us to achieve the 108”+ width without having a seam in the clear vinyl.