...You can only shorten vertical blinds from the top of the slat, because you need to use the folded pockets for the bottom weights, which keep the blind in place. Do not measure the length of the slats until you have fitted the track. How do you measure a vertical blind headrail?
The box has a flat bottom (1), a top enclosure or frame (2) and vertical sides comprised of slats (3 to 8). The slats are secured at their ends to the outside of the bottom and to the inside of the frame. Opposing walls have different arrangements of slats. When one box is ...