 The specimen was not much smaller than known embryos or hatchlings of "Lourinhasaurus" and "Allosaurus", theropods of considerable magnitude.However, given its affinities with the Compsognathidae, it is likely that the adult size of "Scipionyx" did not surpass that of the largest known compsognathid, "Sinocalliopteryx" of 237 centimetres length.As the hatchling would have fitted within an egg about eleven centimetres long and six centimetres wide, this would have implied a rather high egg size compared to the adult body length.