I ordered seven Indow window inserts for my 80 year old forest cabin's original windows. The measuring kit was easy to figure out, and I appreciated the measuring videos. Measuring took some patience since my windows were not square and some had trim pieces that were cupped, warped, cracked or who knows. I re-measured 3 times but the measurements were not really that far off and I placed my order. I still had to re-measure three windows and my efforts paid off. I was very happy to see that all seven inserts fit their windows very nicely, and right away I noticed fewer drafts and the cabin is now much quieter. I went with the black color, since my windows are all stained wood and I love that I hardly notice them in place. All the vintage charm shines through! My only suggestion would be for there to be two loop rings instead of one, especially on the larger windows, to more easily position the inserts.