Breast Pump Flange Size

Find the right flange size for comfortable and efficient pumping.

Measurement

Nipple

How to measure: Measure the diameter of the nipple base (excluding the areola) in millimeters while erect or after pumping.

Fit Recommendation

Recommended Flange Size20mmSuggested Fit

CategorySmall17-19mm

A 20mm flange is your target starting point. Check manufacturer compatibility for 21mm, 24mm, or 28mm standard options.

Disclaimer: This tool is for informational purposes only and is not a substitute for professional medical advice.

Overview

Flange = nipple diameter + 2–4 mm. Affects comfort and output.

Fun Facts

Formula: Flange diameter ≈ Nipple diameter + 2–4 mm.

Used with this

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