--- product_id: 618118077 title: "Nursi Luna Flange Sizing Kit 3-in-1 with 13/15/17/19/21mm for 24mm Electric Breast Pump Flanges/Shields, 10PCS Soft Silicone Flange Inserts for More Comfortable Pumping, BPA-Free, Essential for Moms" brand: "nursi luna" price: "₩31121" currency: KRW in_stock: true reviews_count: 13 category: "Nursi Luna" url: https://www.desertcart.kr/products/618118077-nursi-luna-flange-sizing-kit-3-in-1-with-13 store_origin: KR region: South Korea --- # 5 precise flange sizes (13-21mm) BPA-free soft silicone for comfort Dishwasher safe + cleaning brush included Nursi Luna Flange Sizing Kit 3-in-1 with 13/15/17/19/21mm for 24mm Electric Breast Pump Flanges/Shields, 10PCS Soft Silicone Flange Inserts for More Comfortable Pumping, BPA-Free, Essential for Moms **Brand:** nursi luna **Price:** ₩31121 **Availability:** ✅ In Stock ## Summary > 👩‍🍼 Pump smarter, not harder — comfort that fits like a hug! ## Quick Answers - **What is this?** Nursi Luna Flange Sizing Kit 3-in-1 with 13/15/17/19/21mm for 24mm Electric Breast Pump Flanges/Shields, 10PCS Soft Silicone Flange Inserts for More Comfortable Pumping, BPA-Free, Essential for Moms by nursi luna - **How much does it cost?** ₩31121 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/618118077-nursi-luna-flange-sizing-kit-3-in-1-with-13) ## Best For - nursi luna enthusiasts ## Why This Product - Trusted nursi luna brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Universal Compatibility:** Works seamlessly with most 24mm electric and manual breast pump flanges—upgrade your pump without hassle. - • **Safe & Hygienic Every Time:** Made from BPA-free, food-grade silicone, dishwasher safe, and includes a cleaning brush for effortless maintenance. - • **Custom Fit, Maximum Comfort:** 5 soft silicone flange sizes tailored for your unique pumping needs, reducing discomfort and boosting efficiency. - • **Empower Your Pumping Journey:** Lightweight, reusable, and designed to reduce pain—join thousands of moms who’ve transformed their daily routine. - • **Expert-Backed Sizing Guidance:** Developed by an IBCLC with a nipple ruler and instructions to ensure you never guess your perfect fit again. ## Overview The Nursi Luna Flange Sizing Kit offers 10 soft silicone inserts in 5 sizes (13/15/17/19/21mm) designed by a certified lactation consultant to improve breast pump fit and comfort. Compatible with most 24mm flanges, BPA-free, dishwasher safe, and includes a nipple ruler plus cleaning brush, this kit helps moms reduce discomfort and increase pumping efficiency with expert-backed sizing guidance. ## Description ↓Shop Breastfeeding Essentials Visit the Store ↓Shop Breastfeeding Essentials Visit the Store Nursi Luna understands the challenges mothers face. We're committed to enhancing every mother's breastfeeding experience with products that redefine comfort and quality, ensuring support, confidence, and comfort throughout. Join us to discover how our products can change your life, experiencing the difference in every detail. Nursi Luna understands the challenges mothers face. We're committed to enhancing every mother's breastfeeding experience with products that redefine comfort and quality, ensuring support, confidence, and comfort throughout. Join us to discover how our products can change your life, experiencing the difference in every detail. Review: Very well organized nipple sizing set - These work great. Not sure if it’s Increasing my milk, but it’s doing its job. It lets you know what size the nipple is as well with the measuring card. It fits into my medela hand pump. Review: Made my life so much less painful!! - Definitely worth the money! Having multiple size flange inserts that worth with both my Medela and Lansinoh pumps is wonderful. Being able to pump without the overwhelming amount of pain from the incorrect flange sizes has been such a relief. Using the sizing guide to measure and having the correct flange inserts in the kit along with the sponge thing to clean them has made my life so much more comfortable, as well as easier. I’m not struggling as much to empty completely anymore. I gave some of the smaller sizes I didn’t need to a few moms in the NICU that were going through the same thing after they measured themselves. I had originally planned to donate the sizing guide and leftover flanges to the lactation nurses to help them better measure other moms in the NICU however they couldn’t take them. ## Features - Better Sizing For Better Pumping: Nursi Luna Flange Sizing Kit 3-In-1 is developed by an IBCLC (International Board Certified Lactation Consultant) to help moms find the right flange size more easily. It helps reduce the confusion many moms face when standard breast pump flanges feel too large, uncomfortable, or not quite right, supporting a more comfortable pumping experience and improved pumping efficiency from the start. - Highly Compatible: This 10PCS flange sizing kit includes 5 sizes to choose from—13/15/17/19/21mm soft silicone flange inserts (2 of each size)—and fits most 24mm electric breast pump and manual breast pump flanges/shields. It helps size down the 24mm shield nipple tunnel for a better fit and more comfortable pumping. Note: Not compatible with 27-28mm shields. - Softer, More Comfortable Pumping: Made of BPA-free food-grade liquid silicone, these flange inserts feel softer and gentler than hard plastic flanges during daily pumping. The right size and soft material help improve fit, reduce discomfort caused by rubbing or squeezing, and support a more comfortable, smoother pumping experience with improved efficiency for daily pumping moms. - Easier Sizing Guidance: Developed by an IBCLC, this 3-in-1 nipple flange sizing kit includes a nipple measuring ruler and detailed instruction manual to help moms measure correctly and choose the right flange insert size. We recommend comparing nipple size before and after pumping for a better fit. Whether you need different sizes for each side or size changes over time, this 10PCS kit (13/15/17/19/21mm) offers flexible options for more comfortable, more efficient pumping. - Safe For Mom And Baby: Made of food-grade, BPA-free liquid silicone, these flange inserts are safe, reusable, easy to clean, and dishwasher safe. A sponge cleaning brush is included for added convenience. We recommend replacing inserts every 2 months to help maintain optimal suction. A practical breast pump accessory and a thoughtful registry essential for new moms. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CY81WHD5 | | Additional Features | Better Fit, Comfort and Efficiency, Lightweight, Painless | | Brand | Nursi Luna | | Brand Name | Nursi Luna | | Capacity | 13 Millimeters, 15 Millimeters, 17 Millimeters, 19 Millimeters, 21 Millimeters | | Color | Pink | | Customer Reviews | 4.6 out of 5 stars 2,016 Reviews | | Included Components | 13/15/17/19/21mm Flange Inserts * 2PCS, Cleaning Brush, Nipple Ruler Pink * 1PCS | | Is the item dishwasher safe? | Yes | | Item Weight | 0.14 Kilograms | | Manufacturer | Nursi Luna | | Manufacturer Part Number | FSK-FCS-01 | | Material | Silicone | | Material Type | Silicone | | Model Number | FSK-FCS-01 | | Number of Items | 13 | | Size | 10PCS 13/15/17/19/21mm | | Special Feature | Better Fit, Comfort and Efficiency, Lightweight, Painless | | Unit Count | 13.00 Count | ## Product Details - **Brand:** Nursi Luna - **Included Components:** 13/15/17/19/21mm Flange Inserts * 2PCS, Cleaning Brush, Nipple Ruler Pink * 1PCS - **Material:** Silicone - **Number of Items:** 13 - **Special Feature:** Better Fit, Comfort and Efficiency, Lightweight, Painless ## Images ![Nursi Luna Flange Sizing Kit 3-in-1 with 13/15/17/19/21mm for 24mm Electric Breast Pump Flanges/Shields, 10PCS Soft Silicone Flange Inserts for More Comfortable Pumping, BPA-Free, Essential for Moms - Image 1](https://m.media-amazon.com/images/I/71NrfuwHHvL.jpg) ## Available Options This product comes in different **Color, Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Very well organized nipple sizing set *by B***A on April 9, 2026* These work great. Not sure if it’s Increasing my milk, but it’s doing its job. It lets you know what size the nipple is as well with the measuring card. It fits into my medela hand pump. ### ⭐⭐⭐⭐⭐ Made my life so much less painful!! *by H***L on May 18, 2026* Definitely worth the money! Having multiple size flange inserts that worth with both my Medela and Lansinoh pumps is wonderful. Being able to pump without the overwhelming amount of pain from the incorrect flange sizes has been such a relief. Using the sizing guide to measure and having the correct flange inserts in the kit along with the sponge thing to clean them has made my life so much more comfortable, as well as easier. I’m not struggling as much to empty completely anymore. I gave some of the smaller sizes I didn’t need to a few moms in the NICU that were going through the same thing after they measured themselves. I had originally planned to donate the sizing guide and leftover flanges to the lactation nurses to help them better measure other moms in the NICU however they couldn’t take them. ### ⭐⭐⭐⭐⭐ Definitely worth it! *by H***S on April 14, 2026* If you’re on the fence about ordering this, definitely do it! It fits perfectly into my medela hand pump, the flange inserts into the flange that it already came with it. The first picture shows what I’m explaining. My hand pump came with a size 24mm and I’m a 19mm so definitely a huge difference. It actually doesn’t hurt when I pump now and I get more milk too. Not expensive and made well! Very comfortable too. ## Frequently Bought Together - Nursi Luna Flange Sizing Kit 3 in 1 with 10PCS Flange Inserts 13/15/17/19/21mm, Nipple Ruler, Cleaning Brush, Silicone Flanges Insert Kit for Electric Breast Pumps, Pumping Breastfeeding Essentials - Medela Manual breast pump with Flex Shields Harmony Single Hand for More Comfort and Expressing More Milk - haakaa Manual Breast Pump for Breastfeeding, Silicone, Clear 4oz/100ml --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.kr/products/618118077-nursi-luna-flange-sizing-kit-3-in-1-with-13](https://www.desertcart.kr/products/618118077-nursi-luna-flange-sizing-kit-3-in-1-with-13) --- *Product available on Desertcart South Korea* *Store origin: KR* *Last updated: 2026-06-18*