One custom paddle supplier uses
Posted by: g2d on Nov-19-12 11:14 AM (EST)
cardboard boxes with triangular cross section. That shape is less susceptible to crushing or collapse than square or rectangular cross section boxes. A cardboard box that is long enough can sometimes be made triangular by removing or folding over one side.
I did have a paddle arrive damaged from NRS, and it was shipped in a long cardboard box with square cross section. The damage was a small patch of surface fiber delamination on the back of one blade. it was easier for me to fix myself than to box up the paddle and get an exchange.