Cervix height
A higher or lower cervix can affect how a disc feels and how easy it is to remove.
Fit guide
How to choose a menstrual disc size
The right menstrual disc size depends on your body, your flow and your comfort preferences.
Sizing basics
There is no one-size-fits-all answer
A menstrual disc needs to sit comfortably and stay in place. That means size matters.
Common sizing factors include cervix height, birth history, pelvic sensitivity, age and typical flow level.
Birth history
Some size guides consider whether you have given birth vaginally.
Flow level
A heavier flow may lead you to consider capacity, but comfort still matters.
Practical next step
Use a size guide before buying
A good guide can narrow your choice and help reduce guesswork, especially if you are new to menstrual discs.
Use the size guide