One of my Coastals, Lizzy is almost 8 ft and has the girth of my small male Boa, Butch.
Lizzy, bottom cage
Bredlis generally don't get quite as long as Coastals overall, but can get get close. They do get more girthy than most other Carpets.
Like Ziggy said, IJ's normally max out between 5-6 ft.
Sounds like yours is a mix of IJ and or Coastal/Bredli.