Here at Zomee we care about our customers and want to provide the best support at all stages of the breastfeeding journey. As a way of contributing to your breastfeeding success, we will send you a complementary pair of flanges if you need a smaller or larger shield size. This is limited to users who have just purchased/received their Zomee breast pump and require a smaller or larger size other than the included 21mm and 24mm flex breast shields. Please note that it is helpful to measure yourself to get a more accurate size, as we can only send a single complementary pair.