Willow Breast Pump Sizing Insert, 19mm for 15mm-17mm Nipple Size

Flange Inserts 21mm 8pcs For 17mm-20mm Nipple Size

8 Pcs 15mm Flange Inserts for 24mm Flange/Shield - Nuliie

Using the correct size breast pump flange makes pumping more comfortable and more efficient. Willow Go™ flanges come in 3 sizes (21mm, 24mm and 27mm)

Willow Go™ Wearable Breast Pump Flange Set 27mm (2-Pack)

Willow Breast Pump Sizing Insert Flanges

Buy Willow Breast Pump Sizing Insert

Silicone INSERTS Flange Sizing Kit

A Guide to Finding Your Willow Flange Size — Willow Canada

Willow Universal Breast Pump Sizing Inserts - 2 Pack

Flange Inserts 15 Mm Compatible with Medela, Spectra 24 Mm Shields

Willow Breast Pump Sizing Insert, 19mm, 2 Ct, Flange India

5 Size Breast Milk Pump Flange Inserts Breast Shield Converter