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Breast Flange Sizing Guide

Follow our sizing guide to achieve:

- comfortable pumping sessions
- efficient expressions of breastmilk
- best performance of your pump

1. Know what to measure

When it comes to pumping breastmilk, the size of your nipple must be properly measured for best results.

2. Find your nipple size

After measuring, add 2-3mm to find your flange size. For example, if you measure 16mm, your breast flange size is 19-20mm.

3. Avoid large fit

A flange that is to large can cause discomfort, pain and swelling.

4. Avoid small fit

A flange is too small when your nipple touches or rubs against the tunnel wall of the flange, or no suction occurs.

5. Locate the best fit

When pumping with tthe right size flange, your nipple moves freely in the flange tunnel and not much of the areola is drawn into the tunnel.

Tips to follow

Do not measure your nipples while pregnant.

  • Always measure both breasts; they may not necessarily be the same size. Also, your flange size may change after your milk supply is well-established, approximately (10) weeks postpartum.