When comparing She-Hulk to the Hulk, she isn't as big as him — why is that?

Well, it has to do with her level of exposure to gamma radiation. Unlike her cousin Bruce Banner, who gained his powers via a gamma explosion, Jennifer Walters accepted a blood transfusion from him and did not receive too heavy of a dose of gamma radiation. Therefore, She-Hulk's transformation is less severe and allows her to remain well-proportioned.

Because of this distinction, Marvel made She-Hulk look noticeably different from the Hulk. We all know that Bruce has a tough time controlling his Hulk. However, since Jennifer has less gamma exposure, she possesses more control over her Hulk form as well as her emotional intelligence.

Additionally, a fan on Reddit chimed in on the conversation and referenced an explanation from Immortal Hulk regarding the difference between She-Hulk and the Hulk, noting that their upbringings affected their gamma mutate personas.

"Banner suppressed himself his whole life. He was scared of his long-repressed hatred and resentment, so his Hulk became the person he was always afraid he would become — a destructive monster fueled only by rage," the Redditor wrote.

As for Jennifer, the Redditor said she "was ignored her whole life. She didn't fear an inner darkness; she feared never being seen for all her accomplishments. So her Hulk became the person she always dreamed of being — strong, confident, beautiful, heroic."

"Banner became the person he held himself back from becoming, Walters became the person she was held back from becoming," the fan concluded. "Gamma mutates are 'metaphor people' — what they become is based on the host as much as the radiation."