"How do I know which size cup is right for me:-
While most women can comfortably wear either size of the cup, we want you to find the best fit for your body and flow. Small Size is best if you have not given birth and you do not have light bladder leaks. Medium Size is best for those who’ve given birth or have light bladder leaks. When in doubt, opt for Small, and if for any reason you aren’t happy with the product or the fit, please reach out to us and we’ll make it right. For additional information on how to use a menstrual cup"