How big to butterflies flaps get?

Butterfly flaps, or wings, vary significantly in size depending on the species. Generally, butterfly wings can range from about 1 inch (2.5 cm) to over 12 inches (30 cm) in wingspan. The largest butterfly, the Queen Alexandra's birdwing, has a wingspan that can reach up to 12 inches, while smaller species, like the Western pygmy blue, may only measure around 0.5 inches.