Some of these fragments were complete enough to reconstruct a size of 24 by 10 cm ( about 9.5 by 4 inches ) with shells 2.3 -- 2.5 mm ( 0.09 -- 0.1 in ) thick , roughly half again as large as an ostrich egg and very different in shape from the more rounded ratite eggs .
Some of these fragments were complete enough to reconstruct a size of 24 by 10 cm ( about 9.5 by 4 inches ) with shells 2.3 -- 2.5 mm ( 0.09 -- 0.1 in ) thick . This is roughly half again as large as an ostrich egg , and very different in shape from the more rounded ratite eggs .