The holotype specimen was around 13 metres (43 ft) in length when measured along the vertebral column, while the paratype was about 13 percent larger, measuring around 14 m (46 ft).
A 3D photogrammetry model of the holotype skeleton measures 11.7 m (38 ft) from head to tail, the proportions differing from estimates based on 2D skeletal reconstructions.
The shoulder height reached by these individuals was estimated at around 4 m (13 ft), and the weight at about 7 metric tons (7.7 short tons).
The holotype specimen's endocranial and neurocentral sutures in the skull and vertebrae respectively are unfused, indicating it was a subadult, whereas the paratype specimen has fully fused neurocentral sutures.

In 2020, Vidal and colleagues revised the posture of Spinophorosaurus, based on the mounting of the digital skeleton.
While the original 2009 skeletal recosntruction showed the dinosaur with a horizontal posture, the digital reconstruction showed a more vertical posture, with tall shoulders and an elevated neck.
The holotype specimen was around 13 metres (43 ft) in length when measured along the vertebral column, while the paratype was about 13 percent larger, measuring around 14 m (46 ft). A 3D photogrammetry model of the holotype skeleton measures 11.7 m (38 ft) from head to tail, the proportions differing from estimates based on 2D skeletal reconstructions. The shoulder height reached by these individuals was estimated at around 4 m (13 ft), and the weight at about 7 metric tons (7.7 short tons). The holotype specimen's endocranial and neurocentral sutures in the skull and vertebrae respectively are unfused, indicating it was a subadult, whereas the paratype specimen has fully fused neurocentral sutures.
In 2020, Vidal and colleagues revised the posture of Spinophorosaurus, based on the mounting of the digital skeleton. While the original 2009 skeletal recosntruction showed the dinosaur with a horizontal posture, the digital reconstruction showed a more vertical posture, with tall shoulders and an elevated neck.
Spinophorosaurus