Goku MUI V.1

In the anime and games, the user’s muscles remain virtually the same mass and definition, while in the manga, its initial state makes the user’s musculature slimmed down like Super Saiyan God, but gets larger if the user has kept enough intense training; during the Galactic Patrol Prisoner Saga in the manga, Ultra Instinct Goku is noticeably more muscular than he was during the Tournament of Power.