Acquiring new shipping boxes can be a reasonably straightforward undertaking , but knowing the basics is crucial . Rates fluctuate significantly depending on the size , model, and condition . Standard sizes include 20ft units (roughly 6.03m x 2.44m x 2.59m) and 40ft units (roughly 12.03m x 2.44m x 2.59m), with 40ft extended options also available f