This is a complex walrus with color-changing tusks. The length of the folded walrus will be half the side length of the original square. Regular kami-thickness is fine, layers will bunch at the nose so kami that resists tearing will come in handy.
This class will take over 3 hours to complete, most likely will take 3.5 hours.
The crease pattern is in the Foldspace Convention 2020 book https://www.origamishop.us/foldspace-origami-convention-2020-diagram-boo...
One sheet of kami paper. 6 inch (15 cm) or above (recommend 9 inch or 24cm)