Low Cervix Anyone?

The go-to guide for your cervix height.


Interested in trying the UltuCup Mini? The UltuCup Mini is designed for individuals with a lower cervix or those who feel that Model 1 is too long. UltuCup Mini has the same rim diameter as the Model 1, but is shorter in height.

How do I know if the UltuCup Mini is right for me?

Our resident gynecologist Dr. Kim Langdon has provided us with the information you need to decide if the UltuCup Mini is the right choice.

According to Dr. Kim, to determine your cup size, you first need to measure the length of your vagina. It’s important to know that the average length of the vaginal canal is between 3-4 inches.

The cervix is attached to the uterus and does not move closer to the opening of the vagina unless you have a specific medical condition or uterine prolapse from child birth. It is important to note that while it is not common for the cervix to lower, the vaginal canal can lengthen and shorten during sexual arousal and intercourse, as well as during menstruation.

In the case of uterine prolapse, which is rare if you never had a vaginal birth, the ligaments holding the uterus in place weaken and stretch allowing the uterus to droop or hang lower in the vagina.

The UltuCup Mini can be an option if you have a prolapsed uterus or if you were born with a slightly shorter vagina, but we recommend taking the steps provided below to first measure the length of your vaginal canal before purchase.

Like faces, no two genitals are the same

According to Dr. Kim, the length of a person’s vaginal canal can vary from person to person and when some may think they have a low cervix, they may in fact have a short vaginal canal. Measuring the length of your vaginal canal is a great way to find out if the Mini Cup will fit your body.

How to measure the length of your vaginal canal

  1. Find a comfortable position that will allow you to easily reach your cervix. Try sitting on the toilet, putting one leg up on the edge of the bathtub or squatting.
  2. Make sure to wash your hands with soap and water.
  3. Insert your index finger into your vagina and slide it upward until you feel your cervix. Your cervix is the shape of a small doughnut and it feels a bit like the tip of your nose.
  4. Take note of how far your finger goes inside the vagina when you reach the cervix. It is important to consider the ‘knuckle rule’.

The Knuckle Rule


If your fingertip can feel your cervix with the first knuckle or first bend in your finger inside your vagina, you have a low cervix.


If your fingertip can feel your cervix when your 2nd knuckle is inside your vagina, or roughly half way up your finger, you have a medium or average height cervix.


If your fingertip can feel your cervix when more than your 2nd or 3rd knuckle is inside the vagina or can barely reach your cervix, you have a high cervix.

We recommend the UltuCup Mini if your fingertip can reach the cervix between the first knuckle and middle knuckle. If you find your cervix at the first knuckle point, our UltuCup Mini may be too long to fit your needs. If you can barely reach your cervix with your fingertip or between the second or third knuckle, you can use UltuCup Model 1 or 2.

* Remember you do also have the option to trim the stem.

And there you have it, a step by step guide to measuring your vaginal canal. We hope this guide helps you to better understand which model size is right for you. Please remember that everyone’s anatomy is different and that the information provided above is a general guideline. If you have any questions or concerns, please ask your health care professional or check with our team by emailing [email protected].

Dr. Kim Langdon

Kimberly Langdon M.D. is a retired University-trained obstetrician/gynecologist with 19-years of clinical experience. She delivered over 2000 babies to mothers in a suburban Midwestern community. Beside obstetrics, she specialized in gynecologic diseases such as menstrual disorders, infertility diagnosis and treatment especially pertaining to tubal blockage and polycystic ovarian syndrome (PCOS). Her practice was dedicated to solving complex cases of pelvic pain, menopausal issues, hormone replacement therapies-including natural or bioidentical hormones.

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