Why the world's container ships grew so big

As global trade has grown, shipping companies have steadily increased ship sizes - but the Suez Canal blockage showed that bigger is not always better

The traffic jam at the Suez Canal will soon begin easing, but behemoth container ships like the one that blocked that crucial passageway for almost a week and caused headaches for shippers around the world aren’t going anywhere.

Global supply chains were already under pressure when the Ever Given, a ship longer than the Empire State Building and capable of carrying furnishings for 20,000 apartments, wedged itself between the banks of the Suez Canal last week. It was freed on Monday, but left behind “disruptions and backlogs in global shipping that could take weeks, possibly months, to unravel,” according to A.P.