Many people notice that, as the years go by, their shoe size or foot shape changes. It's not uncommon for someone to experience an increase in shoe size by a half-size or more as they agethis happens because of the changes that occur in the body's ligaments and tendons through the aging process. Tendons and ligaments gradually lose strength and their ability to "spring back," which can amount to a decrease in arch height of the feet, increasing foot length slightly and requiring an increase in shoe size. Age-related tendon and ligament changes may also increase the risk of injury such as tendonitis, tendon tears, or muscle strains.

Increases

Doesn't change a lot as far as i know since i have seen many elders at home having same size