I've recently started looking at menstrual cups and I think I'm going to buy an Mpower cup, minly due to speed and price. According to the suppliers, the cup has ~40mm diameter and ~50mm length. That seems slightly smaller than others I've looked at it, so would it be OK? My gut feel is that smaller will be more comfortable, but I really don't know.
(BTW, I live in South Africa, so their international shipping issues don't bother me.)
Thanks in advance.