I am reviewing this product for people who are lucky enough to come across it in their search and also for the company selling these (great & friendly customer service). We couldn’t be happier with our new window shades. After doing some research and a few quotes from Costco and Home Depot, we decided to give these a try since they were a fraction of the price and looked sooo similar online. I contacted the Tonature customer service and paid 20$ for a sample sheet of colors. (I ended up ordering the white light filtering) and they have far exceeded our expectations. The quality is great—almost identical to the ones we had professionally installed a few years ago on different windows (slight difference in the cassette at the top and the cord both of which are absolutely fine) and they fit our windows perfectly. We started with 2 windows to see how the measurements and installation were. The customer service was A+ with great communication! The product measurements were exact. So the measurements that you give them will probably be what you receive as we did. What really amazed us was the price. We paid a fraction ( I got a quote from a good place to get these almost identical window shades for $3k for 2 of my windows...I paid around $400 for these same 2 windows from Tonature and my husband installing them). For reference one was a "double window" and one was a wider single window. To me, the quality looks just as good as our much more expensive ones. Installation was easy, the first one took maybe 45 minutes but the last one took maybe 30 minutes. Measuring, leveling, putting in the wall anchors, then the screws, then mounting the cassettes. I would have needed a handyman to do this part if my husband wasn't here but I would have still saved a lot I'd guess! The overall look really made our space look great, and we couldn't be more pleased with our purchase. I hope that this review helps you and I attached some pictures that would have helped us when ordering so maybe they can help you. I would start with one and then you can see if you like them and how to hang them and etc. I am glad that I found these. Highly recommend! Good luck!