Have been using one for nearly 10 years, always had size A as only started using after ds1 was born. Never had any trouble. Since ds2 was born 3.5 years ago, I've had such a lot of troub le though. Have completely trimmed stem but it still feels like it's rubbing and seems to slip down. I'm thinking my pelvic floor muscles have been rubbished so have been looking at a MeLuna as they have different sizes. I ma thinking Large, Classic, Basic as I have no trouble removing mine without a stem. Is that gonna help do you think? Any advice gratefully received!