Mstechcorp Solar Toy Dancing Butterfly, Moves Wings on Red Pot Home Decor Great Holiday Gift Measurements approximately:3.25"(H) x 2.75"(L) Material: Durable Plastic Eco-friendly. Batteries are not needed. Hassle-free. Great decoration for office desk, window, and car dashboard. Unique gift for colleagues, friends and family. Butterfly wings swinging when light is directed at the solar strip.