Butterflies represent spiritual rebirth, transformation and change. The metamorphosis that caterpillars undergo in order to assume their true form is less about the beauty of butterflies themselves, and more about the growth and resilience that got the itty bitty caterpillar to this point. I mean, the fact that they're absolutely beautiful definitely doesn't hurt. - 11x8mm. - Composed of gold plated stainless steel. - Hypoallergenic, nickel and lead free.