Nursi Luna Flange Sizing Kit — 10 Silicone Inserts 13, 15, 17, 19, 21 mm for 24 mm Shields

Find your perfect fit for comfortable pumping

Designed with input from an IBCLC, the Nursi Luna Flange Sizing Kit offers a thoughtful approach to flange fit. The soft silicone inserts let you tailor size to your nipple shape and shield diameter, turning a potentially awkward task into a smoother, calmer routine. If you are navigating early pumping or adjusting to new volumes, this toolkit aims to support a more comfortable, confident session each time you connect with your baby.

The kit speaks to real life pumping moments: the quiet of a nursery in the early morning, the gentle pressure of a comfortable seal, the texture of smooth silicone against skin, and the sense of steadier milk flow as you find your best fit. It is a practical set built to adapt as you and your baby grow, without promising overnight results. Instead, it offers options that may help you discover a more comfortable rhythm.

Key benefits you can expect

• Potential lift in milk flow while maintaining a comfortable seal; includes 13, 15, 17, 19, and 21 mm sizes for versatile pairing with 24 mm shields. This variety supports experimentation to find the best match for your comfort and pumping routine.
• Two inserts per size provide flexible options without clutter; note that 27-28 mm shields are not supported. Having duplicates means you can rotate inserts and keep shields clean
• The nipple ruler helps you track changes across lactation stages and select matching flange inserts for optimal suction comfort and complete milk drainage
• Food-grade silicone and BPA-free materials offer a soft, snug fit for a comfortable pumping experience
• Replacing inserts every 1-2 months can help maintain fit and performance during pumping sessions

How to use

• Measure your nipple and monitor changes over time with the IBCLC approved ruler tool, then compare sizes to your shield combination.
• Pair your chosen size with the 24 mm shield and attach to your pump as usual, ensuring a seal that feels comfortable rather than restrictive.
• If you experience discomfort, leakage, or inconsistent flow, try a different insert size and recheck your seal at the shield edge.
• Replace inserts per the recommended schedule to maintain optimal performance and hygiene.

Note: This kit is designed to support comfort and fit across stages of pumping; individual results may vary. For personalized guidance, consult a lactation professional.