One way to find the best flange size to use while pumping is to measure your nipples. This is particularly helpful if you need to purchase better fitting flanges. Evenflo makes six (6) different flange sizes to choose from.
Silicone Nipple Ruler - Instructional Guide – Legendairy Milk
How to Measure Your Nipples to Find Your Proper Flange Size
Correct Flange Size When Pumping
Natural Gluten Free Play Dough Against All Grain - Delectable
How to Find the Right Breast Pump Flange Size
How do I know what size breast pump flange I need? - BabyWombWorld
Flange sizing questions answered + my sizing video — Mattos Lactation
Pumping shouldn't hurt. When pumping is uncomfortable or hurts, it can suppress the amount of milk you are able to express. To avoid discomfort and
Evenflo AdvancedFit Flange System, X-Small Size (21.0mm) - 2ct
Free Flange Size Ruler (Free Printable!) — Milkology®
Evenflo Advanced Double Electric Breast Pump : Target