Flange size matters mommy. Print kpo pumpables nipple ruler. A4 sheet 100% Landscape pag nagkasya ung 25 cents sa 21mm ibg sbhin tama ung pag kaka print mo.. Measure your nipple size BEFORE PUMP/LATCH. whatever size that fits most na hndi masasama ung areola at sakto lng s nipples un ang sukat mo.. Snug fit.. BEFORE LATCH/PUMP - No need to add AFTER LATCH/PUMP - Add 1 to 2mm Meron s shopee, lazada other stores are Breast Pump Princess Milkyways Crazylittlethingshop