You don't need a pattern for curtains. All you need are the measurements. Measure the length, add enough for the top header and bottom hem. I like my top headers to be between 4 and 6 inches so I add 6 to 7 inches for that. For the bottom hems I like them to be 2 to 4 inches so I add 4 to 5 for that. Measure the width of the window. You want the curtains 1 1/2 to 2 times the width.