Android 18 is a fit and beautiful woman of above-average height and fair complexion. She has shoulder-length blonde hair, although its specific shade varied between light/golden or platinum that parts over her left temple, which she generally keeps tucked behind her ear.

She has a fairly small chest in the manga, while in the anime, her chest was implied to be large enough that Master Roshi after their plane crashed took the opportunity to plant his face in her bosom and smother his face within