Simple, functional and affordable. These are roller window shades’ features. Roller shades occupy very little space and are easy to use and maintain. They give great light control: They are available in a range of fabrics, from those that let almost all light pass and let you see through them, to those that block light completely. As a standard option, roller window shades come with a continuous cord loop to lift the shade; you also have motorized mechanism to lift shades with a remote control.
When you order roller window shades, consider that headrails are 1cm wider than shades: For inside mount, this will leave a clearance at both sides. But you can install roller window shades outside the window frame, and there won't be any problem.