The territory consists of the main island of Tristan da Cunha itself , which has a north-south length of 11.27 kilometres ( 7.0 mi ) and has an area of 98 square kilometres ( 37.8 sq mi ) , along with the smaller , uninhabited Nightingale Islands and the wildlife reserves of Inaccessible and Gough Islands .
The territory consists of the main island of Tristan da Cunha itself , which measures about 11.27 km ( 7.0 mi ) across and has an area of 96 km2 ( 37.1 sq mi ) , along with the uninhabited Nightingale Islands and the wildlife reserves of Inaccessible Island and Gough Island .