--- product_id: 518006244 title: "Willow Breast Pump Sizing Insert - 21mm - Flange Inserts, Improves Fit and Comfort for Breast Pumping Moms, Fits in 24mm Willow Breast Pump Flange - 2ct" brand: "willow" price: "118 zł" currency: PLN in_stock: true reviews_count: 8 category: "Willow" url: https://www.desertcart.pl/products/518006244-willow-breast-pump-sizing-insert-21mm-flange-inserts-improves-fit store_origin: PL region: Poland --- # Precise 21mm sizing for optimal fit & comfort BPA-free silicone for safe, skin-friendly use Reusable & dishwasher safe for effortless cleaning Willow Breast Pump Sizing Insert - 21mm - Flange Inserts, Improves Fit and Comfort for Breast Pumping Moms, Fits in 24mm Willow Breast Pump Flange - 2ct **Brand:** willow **Price:** 118 zł **Availability:** ✅ In Stock ## Summary > ✨ Pump in comfort, fit with confidence! 🍼 ## Quick Answers - **What is this?** Willow Breast Pump Sizing Insert - 21mm - 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?** 118 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/518006244-willow-breast-pump-sizing-insert-21mm-flange-inserts-improves-fit) ## 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 - • **Custom Comfort Fit:** Soft, flexible silicone inserts designed to eliminate pinching and maximize pumping ease. - • **Trusted by Thousands:** Join over 300,000 moms who trust Willow for a superior, comfortable pumping experience. - • **Hygienic & Convenient:** Dishwasher safe and reusable, making cleanup quick and hassle-free for busy moms on the go. - • **Universal Compatibility:** Seamlessly fits 24mm Willow flanges and works perfectly with popular pumps like Spectra and Eufy. - • **Size Variety for Perfect Match:** Available in 5 sizes to ensure every mom finds her ideal fit, boosting comfort and milk output. ## Overview The Willow Breast Pump Sizing Insert in 21mm is a BPA-free, flexible silicone flange insert designed to improve fit and comfort for breastfeeding moms. Compatible with 24mm Willow flanges and popular pumps like Spectra and Eufy, it’s reusable, dishwasher safe, and available in multiple sizes to optimize pumping efficiency and comfort. ## Description desertcart.com : Willow Breast Pump Sizing Insert - 21mm - Flange Inserts, Improves Fit and Comfort for Breast Pumping Moms, Fits in 24mm Willow Breast Pump Flange - 2ct : Baby Review: So comfortable! - These are by far the most comfortable inserts I’ve used. The silicone is super soft so it doesn’t give that pinching feeling. They fit my spectra and eufy pumps perfectly and collection cups for the spectra as well. Review: Compatible with Eufy - I bought to go with my eufy pumps and they’re the perfect fit and super comfortable!! ## Features - Reusable Breast Pump Flange Inserts: Designed to help optimize comfort and output for moms who need 21mm, Willow Breast Pump Sizing Inserts in 21mm 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 nipple 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 | B0BX7J17S9 | | Additional Features | Portable, Wearable | | Best Sellers Rank | #13,250 in Baby ( See Top 100 in Baby ) #527 in Breastfeeding Supplies | | Brand | Willow | | Brand Name | Willow | | Color | Clear | | Customer Reviews | 4.5 out of 5 stars 75 Reviews | | Included Components | Breast Flange | | Is the item dishwasher safe? | Yes | | Item Weight | 18.14 g | | Manufacturer | Willow | | Manufacturer Part Number | SZ2186 | | Material | Silicone | | Material Type | Silicone | | Material Type Free | BPA Free | | Model Name | Willow Inserts | | Model Number | SZ2186 | | Number of Items | 1 | | Size | 21MM | | Special Feature | Portable, Wearable | | UPC | 810104130455 | | Unit Count | 2 Count | ## Product Details - **Brand:** Willow - **Included Components:** Breast Flange - **Material:** Silicone - **Material Type Free:** BPA Free - **Special Feature:** Reusable ## Images ![Willow Breast Pump Sizing Insert - 21mm - 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) ![Willow Breast Pump Sizing Insert - 21mm - Flange Inserts, Improves Fit and Comfort for Breast Pumping Moms, Fits in 24mm Willow Breast Pump Flange - 2ct - Image 2](https://m.media-amazon.com/images/I/51hgimPoA7L.jpg) ![Willow Breast Pump Sizing Insert - 21mm - Flange Inserts, Improves Fit and Comfort for Breast Pumping Moms, Fits in 24mm Willow Breast Pump Flange - 2ct - Image 3](https://m.media-amazon.com/images/I/71HR4gJZuJL.jpg) ![Willow Breast Pump Sizing Insert - 21mm - Flange Inserts, Improves Fit and Comfort for Breast Pumping Moms, Fits in 24mm Willow Breast Pump Flange - 2ct - Image 4](https://m.media-amazon.com/images/I/41+Tfn3NCkL.jpg) ![Willow Breast Pump Sizing Insert - 21mm - Flange Inserts, Improves Fit and Comfort for Breast Pumping Moms, Fits in 24mm Willow Breast Pump Flange - 2ct - Image 5](https://m.media-amazon.com/images/I/71PxqF3oeYL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ So comfortable! *by J***8 on December 27, 2025* These are by far the most comfortable inserts I’ve used. The silicone is super soft so it doesn’t give that pinching feeling. They fit my spectra and eufy pumps perfectly and collection cups for the spectra as well. ### ⭐⭐⭐⭐⭐ Compatible with Eufy *by A***I on November 5, 2025* I bought to go with my eufy pumps and they’re the perfect fit and super comfortable!! ### ⭐⭐⭐⭐⭐ Comfortable *by K***M on June 5, 2025* These work great with my Willow Go’s and my other “wall pump.” Very comfortable fit. ## Frequently Bought Together - Willow Breast Pump Sizing Insert, 21mm, 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.pl/products/518006244-willow-breast-pump-sizing-insert-21mm-flange-inserts-improves-fit](https://www.desertcart.pl/products/518006244-willow-breast-pump-sizing-insert-21mm-flange-inserts-improves-fit) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-04-25*