Areola size varies due to genetics, hormones, and body changes. Genes largely determine size, like other physical traits. Hormonal shifts during puberty, pregnancy, or breastfeeding can enlarge areolas, often permanently, as the body adapts. Weight gain may stretch skin, increasing areola size, and changes might persist after weight loss. Large areolas are normal, with no standard size, and pose no health issues unless accompanied by symptoms like pain or discharge, which warrant a doctor's visit. Diversity in size is natural and healthy.