Infographic Tanker Sizes and Capacities Share There are five principle sizes of oil tankers. In ascending order based on size, the smallest is the Panamax, Aframax, Suezmax, VLCC and the ULCC. Published March 22, 2018 | Last modified on September 6, 2023 You may also be interested in Report Marine Oil Spill: Prevention Infographic Tankers Are Easily Identifiable Article Double Hulls