Little Oars Jr. (also referred to as Oars III on his flag) is the captain of the Little Pirates, a descendant of Oars, and a former subordinate of the Whitebeard Pirates. He is among the several New World pirates that aided the Whitebeard Pirates in saving Ace from execution by the World Government.Oars is an abnormally large giant, standing at around 60 meters tall, which is about three times the size of a typical grown giant.[2] His nickname is a tribute to his ancestor Oars who was taller. His overall shape and silhouette resembles his ancestor greatly: large forearms and hands, small lower body and barrel-like gut. His skin is yellow-green and he has orange hair reaching down to his legs, which are quite small in comparison to his large belly and hairy forearms. He has large fangs and horns pointing upward, black triangle-like marks just above his eyes, and some stubble on his chin. He also wears three skulls on a beaded necklace rather than a belt, but the most notable item among his effects is a gigantic kasa hat that Ace made for him,[6] which is usually seen resting on his back in a similar fashion to Luffy.

He also sports a black, open garment that looks like a jacket, samurai-like armor plates protecting his chest and back, linked together by chains, and a loincloth with a mimetic pattern on it which looks like the Marine's battleships' hull and which is held up by a fur-lined belt. He carries around a gigantic sword fitting his size, with a large blade and a long hilt.

In the video game One Piece: Gigant Battle!, his color scheme is similar to his ancestor Oars (the game was developed before Little Oars Jr.' color scheme was revealed in the anime).