BLACKOUT ARCH WINDOUW SHADES: Half Circle window shades are made of non-woven and polyester fabrics, the cellular shades have a built-in aluminum foil that blackout the vast majority of the sunlight. Provide privacy for your indoor living. HONEYCOMB DESIGN: The Arch window shades with honeycomb structure design not only soundproof, but also provide thermal insulation, keep warm in winter and cool in summer. Provide you with a comfortable environment. DIMENSION DETAILS: Our Half moon window shades radius size: 24 , the wide is 1 , suitable for arched windows with a radius between 3 and 24 . You can cut it to the actual radius of your window, it's easy and convenient.