Malaccamax is a naval architecture term for the largest size of ship capable of fitting through the 25 metres (82 ft)-deep Strait of Malacca. This waterway connects the Andaman Sea (Indian Ocean) and the South China Sea (Pacific Ocean). It runs between the Indonesian island of Sumatra to the west and peninsular (West) Malaysia and extreme southern Thailand to the east.
Bulk carriers and supertankers have been built to this size, and the term is chosen for very large crude carriers (VLCC). A Malaccamax container ship would be 470 m long and 60 m wide, with 20 m of draft and 300,000 metric tons deadweight (DWT) for a capacity of 18,000 twenty-foot equivalent units (TEU). The ports' growth requirements could be leading to the creation of new terminals dedicated to those ships.