The doors were extremely well packaged is such a way as to NOT add a lot of bulk but to protect the doors from the normal shipping damage that can occur.  Wood blocking all around to protect edges, extra pad on corners, two layers of foam in front and back (already removed in the picture).  High quality doors (as expected).  I'm going to have to make some modifications because I have an odd size opening but there is lots of "frame" around the slats and panels for making adjustments.