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 June 20, 2024 Trending Article Marine shipping in the Great Lakes: What you need to know Article Ballast water management: stopping the spread of invasive species by ships Article Anti-fouling paints: What are they and what effects do they have on the environment?