Quote Originally Posted by StoneNYC View Post
I did say "the film part" as in the film is double the length not the film + leader/tail.
Nope.

The film itself is slightly shorter than twice the length of the 120, because the small bit of film before the image area (film leader?) and the small bit of film after the image area (film tail?) doesn't need to be duplicated - one of each per roll is enough.