The Momcozy Flange Insert Compatible with the M5 wearable breast pump, available at Fed is Best, offers a simple way to fine-tune the fit of your existing flanges. Rather than replacing your entire flange set, inserts allow you to adjust the tunnel size so that your nipple sits more centrally and moves comfortably during pumping. A small change in size can make a meaningful difference to how pumping feels and how effectively your breasts empty.

Available sizes and variations

Fed is Best stocks the Momcozy M5 flange inserts in several practical sizes so you can find the most comfortable match:

• 15 mm – for smaller nipple diameters or those needing a closer fit.
• 17 mm – for those who need a small step up in width.
• 19 mm – a popular mid-sized insert.
• 21 mm – ideal for those needing slightly more room.

These inserts are designed to be placed inside your existing Momcozy M5 flange, reducing the tunnel size without altering the overall structure. This approach offers flexibility while helping you keep your pump feeling comfortable over time.

Why flange inserts matter

A well-fitting flange supports gentle, efficient movement of the nipple while maintaining an effective seal. When a flange is too large, the nipple and surrounding tissue can be pulled too deeply, leading to discomfort or swelling. When it is too small, friction and rubbing can make sessions painful and discourage regular pumping. Inserts offer a practical middle ground: instead of buying a new flange, you can make small adjustments until you find the size that works best for each breast.

Signs you may need a flange insert

• Your nipple appears off-centre in the tunnel.
• You notice rubbing, pinching or whitening of the nipple after pumping.
• Your milk output seems inconsistent with your expectations.
• You feel discomfort early in a pumping session.
• Excess areola tissue is being pulled into the tunnel.

How to choose a size

A reliable starting point is to measure your nipple diameter (not including the areola) after a feed or pumping session. Add one or two millimetres of allowance and compare your measurement with the available insert sizes. Comfort should guide your final choice. Many parents find that each breast prefers a different size, and this can change over time as your feeding journey evolves. Fed is Best encourages adjusting your equipment as your needs shift rather than assuming one-size-fits-all solutions.

Compatibility and care

These inserts are made specifically for the Momcozy M5 wearable breast pump. They slot neatly inside your existing flanges and can be removed for cleaning. Wash them in warm, soapy water, rinse well and allow them to air-dry fully before reassembly. Follow Momcozy’s guidance on sterilising parts that come into contact with milk.

Supporting your pumping routine

Comfort plays a central role in sustaining a pumping routine, whether you express occasionally or several times a day. By choosing flange inserts that align better with your nipple size, you can reduce sensitivity, encourage more consistent suction and help your M5 pump perform more effectively. Fed is Best stocks a full range of accessories so you can build a kit tailored to your routine.

Why shop with Fed is Best

Fed is Best focuses on providing products that support real families with feeding routines that shift and grow over time. Buying your Momcozy M5 flange inserts through Fed is Best means choosing a retailer that values comfort, practicality and evidence-informed feeding choices. You can pair these inserts with spare parts, cleaning supplies and feeding accessories in one convenient order.