Here's an enormous poster!
This is a lobby display for the "Adventures of Sonic the Hedgehog" (weekday AoSTH) TV show. You can see the DIC and Sega logos near the bottom, as well as the logo for the show.

This poster measures 12ft high and about 6ft wide, so it's higher than most ceilings! You can see a hand at the top and that the person is on a ladder to display it here. It is laminated and made of sturdy thick paper type substance. This is likely quite a rare item. It is unknown how many were made.