Dimensions are estimated to be 7 5/8" x 5 1/16" x 8 5/16 " (including the handle) with a cell size of 2 5/8" x 2 7/16". This would be roughly equivalent to 2100 X 2400 at 300 DPI for the wide face side, or 2100 X 3900 if the image were to wrap around from the wide side to the short side.
haha... and you thought the challenge was the art... try putting that thing together!
Basically you can ignore most of the off to the right, as well as the handles. Just focus on the two large sections as those are the long sides, then the wrap arounds fold together to make up the short sides.
Best bet is to go buy a sixer and tear that puppy down