For world wide shipping the maximum dimensions are thus: less than 120 by 60 by 20 cms each side, less than 20 kgs weight. In other words: not longer than 120 cms, only one side can exceed 60 cms. The cooker must be constructed to fit into international packing standards.
Free air transport
Some people have managed to talk various international air carriers into transporting solar cookers for free. This might be somewhat harder now that the airlines are struggling with high gas prices.