Game of Thrones casting for 'eclectic group of people' with 26 inch waist

A casting call for season five of Game of Thrones posted on Project Casting has called for a specific physical characteristic and set off rumours about what to expect from the highly awaited show.

The casting call reads as:

"We are currently casting FEATURED EXTRAS roles for people of all ages 18 years and over, all ethnicities, and all genders for a production currently filming in Northern Ireland.

The catch? You must have a size 26″ WAIST or LESS. We really are looking for an eclectic group of people for this. If you know anyone (a friend, uncle, grandmother, etc) who would be interested in this but who are not necessarily on Facebook please help them apply for a role in this fantastic scene!

Filming dates are very rough but currently: between 1-4 days between Monday 20th October & 31st October."

Mild spoiler alert!

Fan website Winter Is Coming speculates that this specification could be mean that the upcoming season will feature the Children of the Forest. 

The Children of the Forest are a mysterious non human race and a part of Bran Stark's storyline. While we know that Bran Stark and Hodor will not be part of this season, it is not clear what direction the show's storyline will take. The upcoming season will be combining plotlines from the fourth and fifth book of the series.