Is 3 fifths as big as an Ostrich Egg?
It's about one-and-two-fifths times as big as an Ostrich Egg
The size of an Ostrich Egg is about 2.1560 fifths.
(Struthio camelus) (for common ostrich; average)
The largest egg produced by living birds, ostrich eggs measure about 2.1130 fifths in volume. The eggs take about nine weeks to hatch, with males and females taking turns incubating them.
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