A green dress worn by Ivana Baquero in the role of Ofelia in Guillermo Del Toro's Pan's Labyrinth.
Ofelia can be seen wearing a similar dress in various seens throughout the movie though the button placement varies. However, the button placement on this particular dress matches exactly to the memorable scene where she encounters the Pale Man.
Please contact me if you have, or know the whereabouts of, any other parts of this costume.