: While some women experience "shrinking" due to glandular atrophy, many report an increase in breast size after age 50 due to hormonal shifts and weight redistribution.

: Glandular, milk-producing tissue decreases and is replaced by fatty tissue (adipose), making the breasts feel softer.

The relationship between breast size and aspects of health ... - PMC

This report summarizes the physiological, psychological, and practical health considerations for mature-aged women (typically defined as ages 45–85) regarding breast health and self-perception.

As women age, particularly through menopause, breasts undergo significant morphological changes:

: Common age-related changes include ptoses (sagging), downward-pointing nipples, stretch marks, and a flattened or elongated appearance.