Made by Debris of War the "Large Wooden Packing Cases" come as a four piece set of unpainted resin castings.

The set comprises of 1 each of the following 4 sizes:

 L30mm W26mm H17mm
 L33mm W20mm H17mm
 L42mm W16mm H14mm
 L31mm W16mm H12mm

Warlord games Para for scale purposes. The last picture shows the relative size of the wooden packing cases to the smaller wooden crates.