Best Menstrual Cup for a Low Cervix — 49 mm, No Leaks

A low cervix means the cervix sits low in the vaginal canal, often less than 45 mm from the vaginal opening during menstruation. Standard menstrual cups are 52–57 mm long, so they cannot fit fully below the cervix: the rim ends up level with or above the cervix, the stem protrudes, and blood bypasses the cup.

Leia Cup has a 49 mm body designed by OB-GYN Dr. Elena Dolgan specifically for this anatomy. The shorter body sits fully below the cervix while a firmer rim keeps the seal intact.

How to measure cervix height

Wash your hands, then insert a clean index finger into the vagina during your period, when the cervix is at its lowest. The cervix feels like a firm, rounded bump similar to the tip of your nose. Note how far your finger goes in before you reach it.

• One knuckle or less (about 25–40 mm): low cervix — choose a cup with a body under 50 mm.
• Two knuckles (about 45–55 mm): average cervix — most standard cups fit.
• Three knuckles or your finger does not reach (55 mm+): high cervix — longer cups work well.

How do you know if your cervix is high or low?

If you can feel your cervix with the first knuckle of your finger, it is low. If you need to insert your whole finger and can barely reach it, it is high. Cervix height changes across the cycle and is usually lowest during the heaviest days of your period, which is exactly when a cup has to fit — so always measure then.

Frequently asked questions

What length menstrual cup do I need for a low cervix?

Choose a cup whose body — the part excluding the stem — is shorter than the distance from your vaginal opening to your cervix, measured during your period. For most people with a low cervix that means a body under 50 mm. Leia Cup Small has a 49 mm body, compared with 57 mm for DivaCup Model 1.

Why does my menstrual cup stick out?

The cup body is longer than your vaginal canal, so it cannot sit fully below the cervix. Trimming the stem only removes a few millimetres and does not fix a cup that is too long. A shorter body is the actual fix.

Can you use a menstrual cup with a low cervix?

Yes. A low cervix is a fit problem, not a contraindication. A cup with a short body and a firm rim seals below the cervix and stays comfortable for up to 12 hours.

How much does Leia Cup cost?

Leia Cup is $36.99 with free US shipping, and it comes in Small, Medium and Large.

Leia Cup — menstrual cup designed by an OB-GYN for a low cervix. Shop Leia Cup · Find your size