The mooncup is available in two models model a measures 46mm in diameter and 50mm in length model b measures 43 mm in diameter ad 50mm in lengthr both models have a pull stem 21mm long which you can trim to the length that is right for your please ensure that you select the correct model for hygiene reasons we cannot exchange mooncups once they have been dispatchedr the mooncup is a reusable menstrual cup around two inches long and made from soft silicone rubber it is worn internally