It is stated to have been around 40 ft in length it is apparently known from 1 gigantic vertebra (with the exact size of it being unknown), i've heard most saying it is supposed to be acherontisuchus but tremendously oversized, but honestly i'm not too sure
Here is the mention of this croc in TMS (starts at 46:42)
https://www.youtube.com/watch?v=NCTKHHfsM7Y
