I've seen it advertised as an Intl/Asian 1-sheet (approx. 27 1/2" x 39 1/2") coming from Bangkok, not sure if double sided so have emailed the seller.
I've been doing my research on posters for this film and it's ludicrously frustrating the amount of people that describe the poster as 'Sorcerer's' but show a picture of a 'Philosopher's' version, and visa bloody versa!
On another note I also stumbled on a single sided German version of the Hagrid Intl poster, with pin holes and creases but for under £30.
Out of interest does anyone know if the "Sorcerer's' version is more elusive than the 'Philosopher's' version?