Use Instructions

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6. Breast shield sizing
6.1 Selecting the correct Medela breast shield size
Make sure to use the correct breast shield size. It is an essential component of effective
pumping, helping to optimize milk flow.
Understanding Medela’s breast shield sizing
Pumping should not hurt. For maximum comfort and pumping efficiency, Medela offers
multiple breast shield sizes*.
This guide is a starting point to help determine your optimal size based on your nipple
diameter.
Measure
nipple diameter
(Ø mm)
Breast shield size
(Ø mm)
Up to 17
Up to 20
Up to 23
Up to 26
Up to 32
21 24 27 30 36
*
Nipple base
Areola
Nipple
measure
Step 1
Using a ruler or measuring tape, measure the diameter of the nipple at the base (across the
middle) in millimetres (mm).
Do not include the areola.
Step 2
Based on the measurement, determine the Medela breast shield size.
Example: If the nipple size measures 16 mm in diameter, the recommended Medela breast
shield size is 21 mm.
i Information
The PersonalFit Flex breast shields are available in sizes up to 30 mm. If you need a larger size
breast shield (36 mm) refer to your local Medela retailer or www.medela.com.
* See chapter 14 for ordering information.