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 Microsite Marine Shipping & You Report Tanker Safety Expert Panel I Infographic Angus Reid Poll, March 2016