Arch Wndow Shade Blackout Cellular Shades Half Circle Moon Window Covering No Drill Honeycomb Cordless Blinds for Indoor Windows Room Darkening Easy Install Light Blocking Blinds (1, White, 36x18inch)

The Arch Window Blackout Shade for 48” X 24” Windows (ASIN: B0DD6QX6LY) looks great installed. The blinds come with an adhesive strip already applied to each outside edge and an “arch accessory” (the center support piece). Printed instructions are part of the box label.The blind worked well. The directions are not correct. The instructions state to “Measure the (arch) window, cut the blind to half the width of the bottom of the arch.” The arch accessory has a center section that takes up about 0.5” itself, meaning that now the blind, cut as directed, is too large for the space.My situation. The blind for a 48” X 24” arch window arrives 23.5” long. I measured my 48” window as directed and, per the directions, I should have already been 0.5” too short. However, it was too long. I removed another 1/8” from the length and it barely fit. My recommendation is that one should consider measuring from the center point of the base of the arch to several locations along the arch. Take the shortest measurement and subtract 3/8” to determine the proper cut length. Do verify to see if this will work for your situation.I have also found that achieving a good, balanced installation the first attempt is difficult, especially using adhesive to attach the blind. I also like to be able to remove the blind sometimes and then reinstall it later. This is difficult when using adhesive strips. I changed the plan by adding hook and loop strips to both the blind and the window seal. I directly attached the adhesive strip of the blind to the adhesive that was on the back of the hook and loop material. If I need to reposition or remove the blind, I can gently separate the hook and loop material with the back side of a table knife. To attempt that does not usually work out too well with adhesive strips.