There are many types of curtain shapes that can be made with different materials, patterns, and colors. If you go in to any departmental stores you might find a separate section for that. There are stores that are dedicated to curtains alone. You can make a curtain with a single rod top, or double rod top. Some types would have a rod top with heading and in certain models you can have rod tops on both top and bottom with or without heading.
Before you make a curtain you have to measure the windows size and accordingly you have to choose the rod in which you are going to hand the curtains. You have to calculate the material length according to your window size. In most of the curtains you will be frills and so you have to choose the material accordingly. There are kits that allow you to stitch your curtains according to your wish. A simple search on the internet is sure to bring you a lot of information on the different types of curtains.