Largest turtle/chelonian
1.83–2.13 metre(s)
United Kingdom ()

The largest living chelonian is the widely distributed leatherback turtle (Dermochelys coriacea), which averages 1.83–2.13 m (6–7 ft) from the tip of the beak to the end of the tail (carapace 1.52–1.67 m (5–5 ft 6 in), about 2.13 m (7 ft) across the front flippers and weighs up to 450 kg (990 lb).

The largest leatherback turtle ever recorded is a male found dead on the beach at Harlech, Gwynedd, on 23 September 1988. It measured 2.91 m (9 ft 5½ in) in total length over the carapace, 2.77 m (9 ft) across the front flippers and weighed 961.1 kg (2,120 lb). Although most museums refuse to exhibit large turtles because they can drip oil for up to 50 years, this specimen was put on display at the National Museum of Wales, Cardiff, UK, on 16 February 1990.