Why choose Momcozy Wearable Breast Pump Flange Inserts? Momcozy Flange Inserts 17/19/21mm are designed for use with Momcozy S9 Pro/S12 Pro. It can sometimes be difficult to know what size flange insert you are. Your flange size has nothing to do with your breast size, you can use the picture guide on the link to measure the best flange size for you, which can help you improve the efficiency and comfort of breastfeeding. Some mothers experience nipple swelling while expressing, so it is important to observe the appearance of the nipple during pumping. The size of the flange is very important for comfortable and efficient pumping. Your nipples should not rub or feel squeezed in the flange channel when expressing. All your nipples should fit in the flange channel and be free to go in and out.
