Reading physique by body fat level
Visual body fat charts pair reference physiques with approximate percentages so a number can be matched to appearance. As body fat falls, surface features such as abdominal definition, vascularity, and muscle separation become more visible. The same percentage looks different on men and women because women carry more essential fat, so equivalent leanness shows up at a higher percentage in women than in men.
Common reference points span roughly the lean-and-defined range up through average and higher-storage ranges, but these are illustrative bands, not precise diagnostic cutoffs.
Limits of eyeballing it
Visual estimates are useful for setting expectations but are imprecise: muscularity, fat distribution, lighting, and water retention all change how a given percentage reads. Two people at the same measured body fat can look a category apart. Very low body fat is not a sustainable or healthy target, and women have a higher essential-fat floor that should not be crossed.
Use visuals as a rough guide alongside a measurement method. This is general educational information, not medical advice.