specificatin: Size S: 43mm(diameter), 50mm(length), 25ml(capacity) - applies to women who have not yet given birth to babies, or who have ever had caesarean birth and are less than 25 years old.(For first time use, please read and follow the instruction in the user pamphlet carefully) People who bought from us are saying about the Bodybay Menstrual Cup!- These work amazing! I'm never going back to tampons! - First time user of a menstrual cup, I will never go back to traditional menstrual products. I love everything about this product. No mess and no fuss. I forget that I am using the cup, its that comfortable. - Super easy and comfortable. - Wish I had bought this years ago! - This is a life changer!! I'm 220lb with a heavy flow and this is the best purchase I've ever made. Goodbye tampons! - Ladies, make the switch!!! These are amazing and I have been using a cup for over a year. - They gave amazing suction. Fit really well. - Absolutely love this product! As a nursing student, I felt confident standing, sitting, kneeling, squatting down, and running. This has worked better then ant other menstrual product I have owned and it wonderful for those sensitive to disposable product! - Love them and the price! I'm never going back! Do you have interest in our product and want to take a try? But you still worry about other things? 100% GUARANTEED SATISFACTION: If you are not 100% satisfied with our cups, we will support FULL REFUND for you without any question. The Rest is Easy!