The cowl is 8" round in front, 8 1/2" by 9 1/4" in the back (it has a flat bottom, I measures across the center of the vertical and horizontal axes) and the length is 6" (or so)....

I think the plane is the same dimensions as the Aero works PT-17.

While looking at the plane I noticed that the upper wing has the red stripes on the bottom of the wing....they should be on top...Hope that's the only thing they got backwards...