VLCC*:
~300,000 tons
Largest cargo ship; Mainly used for transporting crude oil to US and Asia from Middle East
*VLCC: Very Large Crude Carrier
Suezmax:
~150,000 tons
Half-size of VLCCs; Mainly used in the Atlantic; Largest tanker that can use the Suez Canal
Aframax:
~105,000 tons
Most versatile crude oil tanker; Can access most ports
Panamax:
~80,000 tons
Mainly used for refined oil product trading