The size of the whole piece is about 18" in diameter. The dragonfly's measurements are: 11" body with a 13" wing span, 5 1/2 " body with a 7 1/2" wing span, and 4 1/2" body with a 5 1/2" wing span. This item looks great hung either inside or outside. If hung outside it will rust naturally even more. If you don't want the wings to rust you could spray them with paint and coat them with a clear polyurethane.
Dragonflies are not born with wings. They go through a partial metamorphosis process, during which they grow their wings.