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 The Latest Interactive Tool Maritime Commercial Incidents & Accidents Dashboard Workshop/Webinar Mariners’ Workshop 2025 Workshop/Webinar Beyond the Horizon: Predictive insights using OCIANA® for collaborative and just-in-time marine operations