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These breast shields do not come in retail packaging.
If you want them in a retail box, purchase the Medela PersonalFit™ Breast Shields in Retail Packaging (2).

Medela offers their PersonalFit™ breast shields in 4 sizes:

• Small size is 21 mm
• Regular size is 24 mm, and this is the size that comes with the Pump in Style pump
• Large is 27 mm
• Extra Large is 30 mm, and they are designed for women with larger nipples.

Check the official Medela Breastshield Guide to help you choose the right size of your Medela PersonalFit™ Breastshileds. Also this article on our site is by a nurse explaining about the importance of choosing the proper size of breastsheild. We do carry the expanded sizes such as XXL and XXL medela breastsheilds.

For use with Personal Fit connectors (sold separately).

If you are having nipple pain during pumping, or you are not able to get a letdown, it may be that a larger breast shield will help. To determine your sizing, hold a half-dollar over your erect nipple (the way it looks when your baby is nursing). If your erect nipple is the same size as the half-dollar, order the extra-large shields. If your nipples are closer to the size of a quarter, consider Medela's large breast shields.

This method is only a rough indication of your sizing; the correct breast shield size is also affected by the milk producing structure that lies under the skin. If you are unsure of which size to buy, you may want to order both the Large and Extra Large sizes to see which fits best.

Works with all Medela Breastpumps except Disposable Kits and Little Hearts(tm) Manual Breastpump.

Contains 2 Personal Fit Breast shields.

Note that if the shields you are replacing are part of a 1 piece configuration that includes the connector to the bottle, you need to order the additional connectors. Medela now sells the breast shields and the connectors separately.

Get a 5-oz Medela bottle 6-pack for all your pumping and storage needs.

We carry a wide range of Medela Breastpump parts:

Medela "PersonalFit" Breast Shield Connectors
Medela Double Ease Pump Tubing
Medela Freestyle Breastpump Replacement Tubing
Medela Pump in Style PVC Tubing
Medela Silicone Tubing
Medela Replacement Parts Kit
Medela Softfit Breast Shields
Medela Yellow Valve with White Membrane
Medela Breast Shield Kit
and other Medela Breastpump Parts and Accessories

As stated on our Shipping/Returns page, we do not accept returns on breastfeeding parts for hygienic reasons.