The depth of the uterus usually refers to the length, and the normal length of the uterus is usually 7 to 8 cm. The uterus is a female internal genital organ, which is a cavity organ, overall showing an inverted pear shape, with a length of 7~8cm, a width of 4~5cm, a thickness of 2~3cm, and a capacity of the uterine cavity of about 5 milliliters. It is divided into two parts: the body of the uterus and the cervix. If a woman suffers from adenomyosis, uterine hypertrophy, uterine fibroids and other diseases will lead to uterine enlargement, which further increases the length of the uterus, and is usually accompanied by symptoms such as irregular vaginal bleeding and abdominal pain. If the length of the uterus is small, it may be caused by uterine dysplasia. Clinical advice is to consult a doctor when there are uncomfortable symptoms, so as not to affect the health of the body.