
Measure carefully. Make sure the top-to-bottom window is 1/2 the side-to-side distance. We have four windows named "Semicircular", the problem is that three of them have small differences and one big one. You are not 1/2 circle. I recommend measuring these distances and making adjustments if necessary. I ordered four on my first order and after not liking the finished shade on one I threw it away and ordered another. THE PROBLEM IS IN THE WINDOW, NOT THE SHADE! We have used them on our windows for many years. I actually bought it at the hardware store. After 10 years they looked a bit dusty so I decided to replace them. Cut them slightly larger, cut 1/4 inch at a time, take your time. They are cool.

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