It is normal that you may benefit from a different size after using Uresta for a while. When you initially start using a pessary, your pelvic floor muscles can get a bit tense as your body gets used to the device. This doesn’t mean your pelvic floor muscles have gotten weaker, just more flexible and less tense. For some women, this happens within hours, for others it can take a few months. If you are finding your are experiencing continued leaks, it would be worth trying a slightly larger size. You may find there is a bit of pressure initially, but this should go away after the bell shape passes the pubic bone. For many this ends up being the size that fits them best!