Question
6.06 metres outside, 5.90 metres inside.
A 20ft shipping container is 6.06 m (19ft 10in) long externally. Internal length is 5.90 m (19ft 4in). The slight difference comes from the wall thickness and end frame. All ISO 20ft containers share this exact length for global handling compatibility.
Did you know?
The length of a 20ft container became a global standard because it balanced carrying capacity with practical handling. That decision still influences transport networks around the world today. 
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