The cervix depth, meaning the distance from the vaginal opening to the cervix, varies among individuals. On average, the cervix is about 3 to 4 inches deep in an unaroused state. For those with a high cervix, depth can be from 4 to 5 inches, while a low cervix may be less than 3 inches deep. The cervix itself is about 1.6 inches long, projecting about 2 cm into the upper vaginal cavity. The vagina lengthens and the cervix moves higher during arousal, making it deeper and sometimes harder to reach.