Ear not fully shaped. Prominent ears protrude due to 2 main issues. The top of the ear lacks an "antihelical fold" which is the curved cartilage paralleling the upper rim of the ear. The bottom of the ear can protrude, because the "bowl" of the ear" just before the ear canal, is overly large. Otoplasty is a cosmetic ear surgery for prominent/protruding ears to "reshape" and "pin" the ears back.