The ovaries are the gonadal organs of women, which secrete estrogen and are indispensable for female reproduction. The size of the ovaries in a normal population is about 4*3*1 cm, but as we age, the ovarian tissue gradually shrinks and becomes smaller. Studies have found that some ovaries in late menopausal women can shrink to the point where they are indistinguishable from the naked eye. The size of the ovaries varies slightly from one population to another and is influenced by congenital genetic factors. In cases of abnormal ovarian pathology, the ovaries may increase in size, for example, in patients with ovarian cysts, ultrasound may indicate cystic enlargement of the ovarian tissue. There is no upper limit to the extent of this enlargement, and in some patients the ovarian mass may fill the entire abdominal cavity. The decrease in ovarian volume is also abnormal in women who are not yet menopausal. In some women of childbearing age, a gradual decrease in menstrual flow is accompanied by a decrease in ovarian volume. Then be alert to the possibility of premature ovarian failure. Since most ovarian diseases have no voluntary symptoms, it is recommended that patients undergo annual gynecologic ultrasound examinations and regular physical examinations to screen for lesions in the female reproductive system. Avoid delaying the diagnosis and treatment of potential diseases. In summary, the normal size of the ovaries is about 4*3*1 cm, with small variations that can occur due to individual differences.