buy standard length curtains (which are far more affordable and available than extra-long versions), and sew on an additional panel of fabric to get the length you need. The key is to create purposeful contrast with either another plain color or pattern. Try to find a fabric that is similar in texture and weight to your store bought curtain so they look less home made. Ready to give it a try? Check out Debbie Doo's no-sew tutorial for adding length to curtains.