Two characteristics are used by Boeing in order to define their Boeing 777 models.
- Fuselage Size
This affects the number of passengers and amount of cargo that can be carried. The 777-200 and derivatives are the base size. Boeing 777-200 aircraft was stretched into the 777-300A few years later.
- Range
These markets are used to compare the 777 to its competitor, the Airbus A340.
Boeing defined B777 into three segments:
- A market: 3,900 to 5,200 nautical miles (7,223 to 9,630 km)
- B market: 5,800 to 7,700 nautical miles (10,742 to 14,260 km)
- C market: 8,000 nautical miles (14,816 km) and greater
