Like his older brother, Boxer doesn't have the normal black or brown hair other characters have. Instead Boxer has green hair. He has his father's eye shape, facial features and tanned skin, and his hair turns blond and eyes turn (pupil-less) teal when he becomes a Super Saiyan, just like his brother. Though Boxer wears a dark blue gi, a purple belt, purple wristbands, and the same golden boots that Trunks wears.
Boxer, like his brother is also shown to be quite cocky and stingy, as well as mischievous, most likely due to the fact that he grew up with his father Vegeta and enjoyed the luxuries of peace, unlike his brother's alternate future counterpart. He is cocky and selfish, traits in which he inherits from his father. Also like his father, he believes his destiny is to be the strongest and dreams to be even more powerful than Goku. Due to this, he spends all his time training with Vegeta, making him very antisocial and have little respect for anyone outside his family.
Boxer was born in Age 769 to Vegeta and Bulma, thus making him a Saiyan and Human hybrid. In his infancy, he was well-loved and doted on by his mother, the same as his brother. But it appeared that his father had little to do with the boy, until he was about two and showed a large amount of power during a fight with Trunks. For Vegeta later admits it.