Here is something interesting;
If you click to enlarge the image below, look into his eye. You will notice a reflection. You can see the bank of the marsh, you can also see me standing there taking this photograph. The image was shot at 150 mm , the short end of my lens.
There was no good way to estimate how big he was. If you could see how many inches between his nose and eyes, then convert that to feet it might be close.
The above was taken as he turned away from me. I think it’s an interesting angle.
This was one of those days when the larger Alligators seemed to be more curious than usual.