Size: 20 x 15mm wing (approx ¾ inch plus earwires) Material: natural butterfly wing set in sterling silver Description: Tiny Sage Green (Callithea Philotima) Shimmerwing Earrings. This jewelry is made from butterfly wings; each piece is unique and some natural color variations occur. Shimmerwings are durable and the colors will remain vibrant so long as you avoid exposure to moisture, including lotions and perfumes.