Here is one I picked up recently on ebay, it's not framed yet, still in its tube....it's 40 x 60 inches, and on a thicker coated stock than the usual one-sheet paper.
The large pic is one I downloaded that looks to be from a one-sheet, but is identical to the 40 x 60 and represents the content of the poster nicely.....
...this is a pic from the actual auctioned poster, and is a better indication of the poster's true colors.