Here's a VERY hungry Indigo. Probably approaching 7 feet in length.
Never seen one this thin. That's a CAT D6 track for reference.
We saw another one (no one's gonna believe me) that was at least 9 ft. It was wallowing in the center a dry pond. The snake's head was 5" long and 3.5" wide. Its body was 9" across and probably 28" in circumference. We flew over that mudhole in a helicopter an hour later. The snake was gone but his slide looked like it was left by a Monitor Lizard.
fwiw, we used to have a larger Indigo that hung around the headquarters.