Fedex Pak is one of the Fedex express services using the packing materials prepared by Fedex:
For larger documents or other compact items.
Total weight (including contents, documentation and packaging) must not exceed 2.5 kg (5.5 lbs). A special FedEx Pak rate which is much lower than normall rates applies up to this weight.
Dimensions: Height 30.4cm (12-1/4"), Width 39.3cm (15-1/2")