This is a honeycomb-structured blind designed for installation inside the window frame. I purchased it on Rakuten Ichiba a year and a half ago, and I'm selling it due to a move. It has light-blocking and heat-insulating properties. It's in excellent condition, with no noticeable scratches, tears, or stains. The fabric has an aluminum honeycomb structure on the inside and fabric on the outside. It should be usable with window frames that have a shorter vertical length than the dimensions listed below. The width is spring-loaded and adjustable, but the absolute maximum width for installation is 2cm on each side (45cm total). (You might be able to accommodate slightly wider windows by using wooden shims or similar.) Dimensions: Width: 41cm Height: 124cm Returns are not accepted due to size discrepancies after purchase, so please purchase at your own risk. Thank you for looking. Type: Vertical Blind