Disney's elephant Dumbo has extremely large what?

Dumbo is the titular protagonist of Disney's 1941 animated feature film of the same name. He is a young elephant and the son of Mrs. Jumbo. Dumbo is most famous for his giant floppy ears, which give him the ability to glide in the air. As an infant, he was harassed for his abnormal ears. While defending Dumbo from such bullies, Mrs. Jumbo was thrown into solitary confinement.

Source: Fandom