How to Choose Your Size: Just measure your window’s width and round DOWN to the nearest 1/2" size. Pick a width slightly smaller than your window’s exact measurement: If your window is 30 7/8" wide → choose 30 1/2". If your window is 30 1/8" wide → choose 30". No Drill Design: A solution to cover your windows without the hassle of drilling holes and install the shades without tools in 30 seconds. Easy as 123! 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. Energy-efficient Window Shades: Open air design, traps the air insde the shade, make it more difficult for energy to transfer from the one side to another side which makes the house warmer in the winter and cooler in the summer. Eexcellent Material: The headrail and the bottom rail are both made of aluminum, they are weighted and rigid so it hangs flat and prevents from wind blowing. Discover the perfect solution for your windows with our kitchen blinds for windows over sink. Designed for effortless installation, these no drill no tool window shades ensure a seamless setup in minutes. Perfect as cordless blinds, they offer a modern and elegant look without the need for tools or drilling holes.