No Drill Design: A solution to cover your windows without the hassle of drilling holes and install the shades without tools in 30 seconds. Cordless & Free-Stop System： Smooth and quiet glide spring system provides a clean and tangle-free look and creates a safer environment for both children and pets. It will stay at whatever position you stop and can be easily raised or lowered with the touch of a finger. Eexcellent Material: The headrail and the fabric wrapped bottom rail are both made of aluminum, they are weighted and rigid so it hangs flat and prevents from wind blowing. Premium jacquard fabric: High-quality jacquard fabric, offering a luxurious texture and visual appeal. Whether used for home décor or commercial spaces, it provides a high-end window treatment experience. How to choose the correct size? This no drill blind can only be inside mounted. The blind width should be a little smaller than the window width(1/8"～1/4"), and the blind height should be longer than your window height. For example, if your window measurement is 23 1/4" wide x 50" high, then you should choose the blind size 23"W x 60"H. If your window width is 34 7/8" wide x 72" high, then you should choose the blind size 34 3/4"W x 84"H.