Saichania was a herbivore measuring up to seven metres long. Its body was armoured from head to toe. It had spike-like protrusions all over its body and head. A Saichania was around seven metres long and covered in spiky armour. With its mace-like tail, it could defend itself against attackers. With its complex airways and unusually hard gums, this dinosaur was well adapted to life in the desert where it fed on hard-leaved plants.