The size of the uterus in a normal uterus is about 50 x 40 x 30 millimeters, and can fluctuate within this range. The female uterus begins to develop during puberty, and the uterine body gradually grows in size and matures after puberty to play the role of producing menstruation and nurturing the fetus, at which time the uterine body measures about 50 x 40 x 30 millimeters, and can fluctuate mildly within this range. During menopause, the uterus shrinks to a certain extent due to a decrease in hormone production, and its size decreases again. When a woman’s uterus is too large, she should consider whether it is adenomyosis or pregnancy, etc. When the uterus is too small, she should consider whether it is a naïve uterus or after menopause. If there is any abnormality in the size of the uterus, it is recommended to go to the hospital in time to improve the examination and make a clear diagnosis.