Before identifying window treatment design ideas, get good measurements on the window you would like to cover. This can make it easier for you to narrow down your options when you go shopping. Measuring from the outside of the window frames for width and height is best for curtains if you plan to cover the windows entirely. Some panels may be made to cover the window only exposing the frame for a design effect. If this is the case, then measure the width and height from inside the window frame. Taking these steps in advance can help you select the right window coverings for your room and make installation much easier.