Every woman is different. Therefore, you should not buy your menstrual cup just like you feel it's the right one. First you should collect some information about your body. How to measure your pelvic floor muscles and your cervix, you can read in our FAQ. In order to be able to recommend the suitable sizes and models for you, please answer the following questions:
Have you already given birth vaginally, if yes how often? If you are still a virgin please select this accordingly
How strong is your menstrual bleeding ?
How strong are your pelvic floor muscles?
How high / low is your cervix during your mens ?