Whats the name of the biggest moth in the world ?

The Atlas moth is one of the largest lepidopterans with a wingspan measuring between 25–30 cm (9.8–11.8 in) and a wing surface area of about 400 cm^2 (62 in^2). Attacus atlas, the Atlas moth, is a large saturniid moth endemic to the forests of Asia. The species was first described by Carl Linnaeus in his 1758 10th edition of Systema Naturae.