Paper: hexagon with a side length of 10.5cm (diameter: 21cm), elephant hide
Model: hexagon with a diameter of 11cm
Yo, What grid is utilised in the making of this?
As in grid division used in the hexagon.
Where can the diagram or pattern for this be found?
The crease pattern was part of the 1 International Origami Internet-Olympiad 2011. I couldn't find a pattern online, but you might be more lucky. For example, check Peter's Flickr stream: http://www.flickr.com/photos/syngola/