Achieve a more comfortable and efficient pumping experience with our Generic Silicone Flange Insert (21mm), designed to be used inside standard 24mm hard breast pump flanges. This soft, flexible insert helps reduce nipple trauma and improve milk flow by ensuring the right fit for your breast anatomy.
Why Flange Size Matters
Using the correct flange size is essential for:
Maximising milk output
Preventing pain and nipple damage
Reducing blocked ducts and mastitis
Maintaining long-term breast health during pumping
An incorrect flange size may cause friction, poor suction, or reduce milk flow, leaving you uncomfortable and frustrated.
How to Measure Your Nipple Size
To determine your correct flange insert size, measure your nipple diameter (not including the areola) after a pumping session or when your nipple is at its largest.
Use a ruler or nipple measuring tool to measure the diameter in millimetres (mm).
Choose a flange 2-3mm larger than your nipple measurement for optimal comfort and function.
Flange Insert Sizing Guide
Flange Insert S ize Nipple Diameter (after pumping)15mm Insert 11-13mm17mm Insert 13-15mm19mm Insert 15-17mm21mm Insert 17-19mm
Tip: If your nipple measures 18mm, a 21mm insert is the recommended size
Product Features
Made from soft, food-grade silicone
Compatible with most 24mm flanges (check pump brand compatibility)
Easy to clean and reuse
Ideal for mothers who experience pain or reduced output with standard flanges
Upgrade your pumping comfort with the 21mm Silicone Flange Insert - because every millimetre matters.
What's in the box
1 x 21mm Flange insert
