1963 Rear Window Identification

I can measure the opening of my 63 when I get home. I have the rear glass out but it is still packed in a wooden crate from when I had it shipped from texas.

Something, however doesn't look right between the 2. The 63 glass has a smaller opening so it should be shorter in height. It should also be narrower. Other than that the shape should be pretty close to the same I would think as the 64 is bigger but follows the same roof line.

Either way, I will let you know what mine measures out to be.