Best I can do is the enclosed picture. We have 2 the size of the one in the picture-that are opposite closures (approximately 33 1/2 inches.
We have a total of 5 windows but I can't open any but the one above. The arm on the one above is approximately 10" on the part that says EntryGard TRUTH
The smaller piece is about 4" and says 20755
I do have the window sizes:
33 1/2 not side by side but one opens left and the other right (The one pictured above is one of these).
27 1/2 side by side but one opens left and the other right
21 1/2 a single window opens from the left