A specimen from the Pliocene of Morocco could be 20% bigger than an adult male of the extant Struthio camelus, but the African specimens are considered dubious, and the "exact proportions are difficult to reconstruct on the basis of the available material."
A fossil specimen from the Pliocene epoch in Morocco might be up to 20% bigger than a mature male ostrich, however, African fossils are uncertain, and precisely calculating their dimensions is difficult due to the limited information available.