This skull is approximately 60 cm long. Diprotodon reached 3 m in length.
Despite its size and robust appearance, Diprotodon’s skull was lightly built and was as thin as eggshell in places. Consequently, a complete, unbroken skull such as this one found near Bacchus Marsh, is a rare find. The feet of Diprotodon were also unusual; the fossil foot bones and preserved footprints indicate that it walked with its hind feet turned slightly inwards. These feet needed to support the weight of the largest marsupial to have lived.