Installation method Fold and measure frame size 1. Width: Measure the width of the window frame from left to right. The widest size at the top, middle and bottom of the window is the suitable width of the frame. 2. Height: Measure the height of the window frame from top to bottom. The largest size on the left, middle, and right sides of the window is the appropriate height of the frame. Fold and measure inner frame size 1. Width: Measure the width of the inner frame of the window from left to right. Subtract 1cm from the smallest width at the top, middle and bottom of the window to determine the appropriate width of the inner frame. 2. Height: Measure the height of the inner frame of the window from top to bottom. The minimum height of the left, middle, and right sides of the window is the appropriate height of the outer frame. 3. Make sure the window depth is sufficient for the blind blades to move freely. Different blind installation methods require different window depths. 4. A…