Terminal 1 (measuring 496,000 square metres (5,338,900 sq ft)) is the largest airport terminal by area in South Korea. Terminal 1 was designed by Curtis W. Fentress, FAIA, RIBA of Fentress Architects. It is 1,060 metres (3,480 ft) long, 149 metres (489 ft) wide, and 33 metres (108 ft) high.