Sea turtles can get huge: the largest species, the leatherback , can reach about 2 meters (6+ feet) long and close to a metric ton in weight in extreme cases.

Biggest sea turtles

  • Leatherback sea turtle
    • Typical adult length: about 1.5–2 m (4–6 ft).
* Typical adult weight: roughly 300–500 kg (660–1,100 lb).

* Verified giant: one record-holder was about 2.56 m (8.4 ft) long and weighed around 916 kg (about 2,000 lb).
  • Other sea turtle species (for comparison)
    • Smallest species (olive ridley, Kemp’s ridley): shell length around 50–70 cm (about 2 ft) and up to ~45–50 kg (100–110 lb).
* Green sea turtles: can reach around 1.2 m (4 ft) and roughly 200–250 kg (440–550 lb) in large adults.

Simple size table

[5][3] [5][3] [7][3] [3][7] [7][3] [7] [3][7] [3][7] [7][3]
Species Typical adult length Typical adult weight Largest recorded
Leatherback ~1.5–2 m (4–6 ft)~300–500 kg (660–1,100 lb)2.56 m, 916 kg (8.4 ft, ~2,019 lb)
Green ~0.75–1.2 m (2.5–4 ft)~45–250 kg (100–550 lb)About 1.5 m, 395 kg (5 ft, 871 lb)
Olive & Kemp’s ridley ~0.5–0.8 m (1.6–2.6 ft)Up to ~45–50 kg (100–110 lb)Not close to leatherback size

Quick Scoop

  • The absolute giants are leatherbacks, which can be longer than many people are tall and heavier than a small car in extreme individuals.
  • Most sea turtles you see in photos or on beaches are much smaller than the record-breakers, often under 1 m long and under a few hundred kilos.
  • Online “monster turtle” pictures are often just clever camera angles, but even without tricks, real sea turtles can be genuinely colossal animals.

Information gathered from public forums or data available on the internet and portrayed here.