Some writers like pairing up characters of opposite sex and opposite ends of the size spectrum. The height difference goes well beyond One Head Taller , and the tall one is often several times wider to boot. Averted more often than not in film and Live-Action TV , where props and camera angles are employed to equalize the heights of the leading man and lady, to make filming easier otherwise, getting them in the same shot would be a pain in the arse. Even when the actors themselves represent this trope, if it appears on screen you can be sure there was an intentional choice to invoke it. Usually, it's the man who's bigger.