In The Super Mario Bros. Movie (2023), Bowser is depicted as being about 16 feet tall (4.88 meters) when standing upright. This is consistent with his traditionally large and imposing stature in the Super Mario franchise, although the exact height may vary slightly depending on the adaptation. In the movie, Bowser is visually much larger than Mario, which helps emphasize his role as the main antagonist and a powerful force to be reckoned with.
The filmmakers chose to keep him physically massive, allowing him to tower over many of the other characters, which helps highlight his villainous presence and strength in the story.