Top 5 Largest T.rex Specimens

5. CM 9380 (7500 kg)

CM 9380 is the holotype of Tyrannosaurus rex. Despite being the first remains attributed to the genus, it's not the largest. It's more gracile than the others on the list.

4. BHI 3033 "Stan" (7722 kg)

Stan represents a fairly bulky T.rex at nearly eight tons. He was eighteen years old at the time of death, so he could have grown larger.

3. AMNH 5027 (7900 kg)

Besides the holotype, this is one of the first skeletons attributed to T.rex. It is thought to be twenty-one years old at the time of death, indicating that it's an adult. It may have been able to grow larger.

2. RSM P2523.8 "Scotty" (8600 kg)

Scotty is the bulkiest T.rex in proportion to her body length, but surprisingly, not the largest. However, it's a close margin. Randomdinos on DeviantArt arrived at an 8600 kg mass for this beast, making her truly titanic.

1. FMNH PR 2081 "Sue" (8830 kg)

Unsurprisingly, the poster-child of Tyrannosaurus rex is number one. Estimates for her size range between 8400 and 9500 kg, with the former having slender legs and the latter suffering from her mount's inflated ribcage. That leaves Franoys' 8830 kg estimate and Snively et al's 9100 kg. I generally use the former for the sake of being conservative, but it's still a massive figure.