--- product_id: 612472941 title: "Breast Pump Sizing Insert - 19mm - Flange Inserts, Improves Fit and Comfort for Breast Pumping Moms, Fits in 24mm Willow Breast Pump Flange - 2ct" brand: "willow" price: "€ 43.14" currency: EUR in_stock: true reviews_count: 5 category: "Willow" url: https://www.desertcart.at/products/612472941-breast-pump-sizing-insert-19mm-flange-inserts-improves-fit-comfort store_origin: AT region: Austria --- # Precise 19mm size for optimal fit Reusable & dishwasher safe for easy cleaning BPA-free silicone for safe use Breast Pump Sizing Insert - 19mm - Flange Inserts, Improves Fit and Comfort for Breast Pumping Moms, Fits in 24mm Willow Breast Pump Flange - 2ct **Brand:** willow **Price:** € 43.14 **Availability:** ✅ In Stock ## Summary > 🍼 Pump smarter, not harder — comfort and fit that keep you flowing! ## Quick Answers - **What is this?** Breast Pump Sizing Insert - 19mm - Flange Inserts, Improves Fit and Comfort for Breast Pumping Moms, Fits in 24mm Willow Breast Pump Flange - 2ct by willow - **How much does it cost?** € 43.14 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/612472941-breast-pump-sizing-insert-19mm-flange-inserts-improves-fit-comfort) ## Best For - willow enthusiasts ## Why This Product - Trusted willow brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Hygiene Made Simple:** Dishwasher-safe design means quick, effortless cleaning so you can focus on what matters most. - • **Tailored Comfort Fit:** Custom 19mm flange inserts designed for smaller sizes ensure maximum comfort and improved milk output. - • **Trusted by Thousands:** Join over 300,000 moms who rely on Willow’s innovative pumping solutions for hands-free freedom. - • **Seamless Compatibility:** Works perfectly with 24mm Willow breast pump flanges and containers for a hassle-free pumping experience. - • **Premium Silicone Material:** Flexible, BPA-free silicone offers a soft, secure seal that’s gentle on skin and easy to clean. ## Overview The Willow Breast Pump Sizing Insert in 19mm is a BPA-free, flexible silicone flange insert designed to optimize comfort and milk output for moms with smaller breast sizes. Compatible with 24mm Willow flanges, it’s reusable, dishwasher safe, and recommended for replacement every 3 months to maintain peak performance. Trusted by over 300,000 moms, it delivers a secure, snug fit for a seamless, hands-free pumping experience. ## Description Designed with moms in mind, Willow Breast Pump Flange Inserts help optimize comfort and output for moms who need a wearable breast pump flange smaller than 21mm. Made from BPA-free, dishwasher-safe silicone, each flange insert is easy to assemble, clean and remove. Clear color delivers easy nipple visibility for a secure, snug fit. Available in 13mm, 15mm, 17mm, 19mm and 21mm, our flange inserts are compatible with 24mm Willow flanges and containers. We recommend replacing breast pump inserts every 3 months for optimal breast pumping performance. Normal wear and tear can impact suction and output. You deserve a pump you love. Powerful, comfortable, fully in bra and app-connected, our wearable pumps for breastfeeding are simply built different. So cut the cords, ditch the dupes and join the 300,000 moms who have brought Willow into their lives. Find your perfect Willow breast pump today and unlock the convenience of hands-free pumping. Review: Best for willow - If you own a willow pump these are the best for it. Do check the size accurately before buying though. These are very soft and fit perfectly with the willow. Cheaping out on these are a bad idea, the originals are much better Review: love it - very well made, and exact fit, also comfortable and easy to wash ## Features - Reusable Breast Pump Flange Inserts: Designed to help optimize comfort and output for moms who measure smaller than 21mm, Willow Breast Pump Sizing Inserts in 13mm offers the pumping convenience you deserve - Comfortable, Silicone Design: Flexible, BPA free silicone provides a snug, secure fit; Dishwasher safe, flange inserts for Willow Breast Pump are easy to clean; Clear color provides easy visibility - Compatible with Any Breast Pump: Pair with 24mm breast pump flanges and reusable containers; Keep a spare set on hand to minimize washing between hands free pumping sessions - Find Your Perfect Fit: Breast pump inserts are available in 5 sizes: 13mm, 15mm, 17mm, 19mm and 21mm; Reference Willow's size chart to determine your size for an optimal pumping experience - Trusted and True: We recommend replacing breast pump flange inserts every 3 months for optimal performance; Join the 300,000 moms who have brought Willow into their homes and lives ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09B7WMGGQ | | Additional Features | Wearable | | Best Sellers Rank | #26,766 in Baby Products ( See Top 100 in Baby Products ) #158 in Breast Pump Parts | | Brand | Willow | | Brand Name | Willow | | Color | Clear | | Customer Reviews | 4.7 out of 5 stars 1,388 Reviews | | Included Components | Breast Flange | | Included components | Breast Flange | | Is the item dishwasher safe? | No | | Manufacturer | Willow | | Manufacturer Part Number | SZ1964 | | Material | Silicone | | Material Type | Silicone | | Material Type Free | Lead Free | | Model Name | Willow Inserts | | Model Number | SZ1964 | | Number of Items | 1 | | Operation Mode | Manual | | Operation mode | Manual | | Power Source | Battery Powered | | Power source | Battery Powered | | Product Style | Compact | | Size | 19mm | | Special features | Wearable | | UPC | 858298006613 | | Unit Count | 2 Count | ## Product Details - **Brand:** Willow - **Material:** Silicone - **Operation mode:** Manual - **Power source:** Battery Powered - **Special features:** Wearable ## Images ![Breast Pump Sizing Insert - 19mm - Flange Inserts, Improves Fit and Comfort for Breast Pumping Moms, Fits in 24mm Willow Breast Pump Flange - 2ct - Image 1](https://m.media-amazon.com/images/I/31LUxe1lEfL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Does it come with one or two?** A: Two :) **Q: Are these compatible with the Willow Go?** A: Yes **Q: Can I use these for the zomee z2?** A: I don’t own the zomee but I have tried these with several different pumps and these inserts can pretty much fit universally into any 24mm flange. **Q: I measured for a 17mm flange. According to the sizing chart I would order a 19mm. Is that correct?** A: That is what I did and ir fit very well. I can use them in my willow go and my momcozy s12 pro! ## Customer Reviews ### ⭐⭐⭐⭐ Best for willow *by H***A on 29 March 2026* If you own a willow pump these are the best for it. Do check the size accurately before buying though. These are very soft and fit perfectly with the willow. Cheaping out on these are a bad idea, the originals are much better ### ⭐⭐⭐⭐⭐ love it *by C***E on 7 January 2026* very well made, and exact fit, also comfortable and easy to wash ### ⭐⭐⭐⭐⭐ Perfect! *by W***N on 1 March 2026* The breast pump inserts worked great in my daughter’s breast pump. ## Frequently Bought Together - Willow Breast Pump Sizing Insert, 19mm, 2 Ct, Flange Inserts for Breast Pump, Improves Fit and Comfort for Breast Pumping Moms, Fits in 24mm Willow Breast Pump Flange - Willow - 360 Breast Pump Flextubes - for Spare Use or Replacement Part for The Willow 360 or 3.0 Wearable, Hands-Free Breast Pump, Breastfeeding Essential for New Moms- 2ct - Willow - 360 Pump Spill-Proof Breast Milk Bags - 48 Ct - Holds 4 oz. Per Self-Sealing Storage Bag - Compatible with Willow 360 or 3.0 Wearable Hands Free Breast Pump --- ## 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.at/products/612472941-breast-pump-sizing-insert-19mm-flange-inserts-improves-fit-comfort](https://www.desertcart.at/products/612472941-breast-pump-sizing-insert-19mm-flange-inserts-improves-fit-comfort) --- *Product available on Desertcart Austria* *Store origin: AT* *Last updated: 2026-08-20*