Body-length estimates, based on the 1959 Harvard reconstruction, had put the total length of "Kronosaurus" at 12.8 meters (42 feet). However, a recent study compared fossil specimens of "Kronosaurus" to other pliosaurs. The Harvard reconstruction may have included too many vertebrae, exaggerating its length. Its true length was probably only 9–10.9 meters (30–36 feet).