When using Freemie Cups, it's really important to use the correct flange size, and to monitor your nipple size over time. Freemie Cup and Pump sets typically come with size 25mm and 28mm to start with. There are additional soft Fitmie insert size
Pump Parts Inserts 19mm 21mm, 4 Pcs Silicone Inserts Fit 24mm
Freemie Deluxe Hands-Free Collection Cups
24mm/27mm Shield/Flange for S9 Pro Wearable Pump
Maymom Flange Inserts 17 mm for Freemie Reviews
Freemie Independence II
What breast flange size do I need? : Freemie
Freemie Pump with Your Shirt On – Perfectly Imperfect Parenting
What breast flange size do I need? : Freemie
Ultimate Guide to Selecting a Breast Pump - Byram Healthcare
2x 19 mm insert compatible with Freemie 25 mm cup. NOTE not to go with 28 mm Freemie cup Made from silicone. BPA free, DEHP free. Dishwasher toprack
19mm Maymom Flange Inserts (Long) Compatible with Freemie 25mm Flanges; Compatible with 24mm Medela PersonalFit Flange, Spectra 24mm Flange, Willow
LOZAEVE 20mm Silicone Flange Inserts Compatible with
Flange Size Chart
Fitmie Nipple Inserts – perfect fit to the Collection Cup
Ardo Flange INSERTS and sizing options