1300 x 1300.
I built this not long ago. The floor is an old pallet I picked up off the street, the frame is softwood which should cost next to nothing, and the walls and roof are green tounge flooring panels - I paid $25 for a sheet 2400 x 800.
Im no carpenter I just worked it out as I went along but if anyone wants any advice on how to build one like it ask away.
