Simba is a lion of great size and stature, with a large dark red mane and tail tuft. Many of his physical features are similar to those of his father Mufasa, such as his square jaw and small, pointed ears. He is powerfully built and broad-shouldered. His fur is brownish-gold, while his muzzle, paws, and underbelly are creamy tan.
He has reddish-brown eyes, dark red-brown whiskers, and a pink nose. He strongly resembles his son, Kion.