The MSC Oscar is not the worlds largest ship but it carries 124 more containers than the CSCL Globe, which used to be the worlds largest container ship, despite being slightly shorter. The MSC Oscar is 1,300 ft long and can carry 19,224 containers. It is the worlds largest container ship.
MSC Global, Worlds largest Container ship (above) and the former worlds largest container ship the CSCL Globe (below)
When you consider there are more than 6,000 container vessels currently in service, one begins to see the scale of the inter modal freight system.