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Handymax and Supramax are naval architecture terms for a bulk carrier, in a series that is called Handysize class. Handysize class consists of Supramax (50,000 to 60,000 DWT), Handymax (40,000 to 50,000 DWT), and Handy (<40,000 DWT). The ships are used for less voluminous cargos, even allowing for combining different cargos in different holds.[1][2] Larger capacities for dry bulk are called Very Large Ore Carrier (VLOC), or Chinamax.

Post-Panamax or over-Panamax denote ships larger than Panamax that do not fit in the canal, such as supertankers and the largest modern container ships. The 'largest oil tanker in the world' — whichever ship held the title at the time — has not been able to transit the Panama Canal at least since the Idemitsu Maru was launched in the 1960s; she was about 150,000 deadweight tons. U.S. Navy supercarriers are also in the post-Panamax class; the Nimitz class aircraft carriers are 1,092 ft (332.84 m) long overall with a beam of 134 ft (40.84 m), while the flight deck is 252 ft (76.81 m) wide.

Capesize vessels are typically above 150,000 long tons deadweight (DWT), and ships in this class include oil tankers in the Very Large Crude Carrier (VLCC) and Ultra Large Crude Carrier (ULCC) classes; supertankers and bulk carriers transporting coal, ore, and other commodity raw materials. The term "capesize" is most commonly used to describe bulk carriers rather than tankers. A standard capesize bulker is around 175,000 DWT, although larger ships (normally dedicated to ore transportation) have been built, up to 400,000 DWT. The large dimensions and deep drafts of such vessels mean that only the largest deep water terminals can accommodate them.

The typical deadweight of a Suezmax ship is about 240,000 tons and typically has a beam (width) of 50 m (164.0 ft). Also of note is the maximum head room—"air draft"—limitation of 68 m (223.1 ft), resulting from the 70 m (230 ft) height above water of the Suez Canal Bridge. Suez Canal Authority produces tables of width and acceptable draft, which are subject to change.[2] Currently the wetted surface cross sectional area of the ship is limited by 945 m2, which means 20.1 m (66 ft) of draught for ships with the beam no wider than 50.0 m (164.0 ft) or 12.2 m (40 ft) of draught for ships with maximum allowed beam of 77.5 m (254 ft 3 in).

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