Standing, the Paraceratherium was about 16 feet tall at the shoulder, which is about two to three feet taller than a giraffe and about three times as tall as a six foot tall human!
The Paraceratherium was about eight meters or 26 feet long from head to butt!
The humerus bone (the upper arm bone) is as thick as a grown mans body and about three and a half feet long.  The radius (one of the forearm bones) is about five feet long (Osborn, 1929).
Size comparisonOther parts of the body such as the skull have been a large focus for researchers.  The skull is about 52 inches or 4.25 feet in length!  Other measurements that have been taken include the width at the base of the back of the skull of 33 cm, width across the skull at the zygomatic arches or cheek bone of 61 cm and 33 cm tall at the back of the skull (Osborn, 1929).  The skull also had large nasal incisions that reach far back into the skull indicating a possible trunk or proboscis.  Read more about this in adaptations. Furthermore, the Paraceratherium needed a very strong neck to support the head.  The neck vertebrae are very large and wide and contain many holes and passages to allow for strong muscles and ligaments to pass through to support the huge head (Osborn 1929).