---
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: "€ 20.13"
currency: EUR
in_stock: true
reviews_count: 8
category: "Willow"
url: https://www.desertcart.ie/products/518006244-willow-breast-pump-sizing-insert-21mm-flange-inserts-improves-fit
store_origin: IE
region: Ireland
---

# Precise 21mm sizing for optimal fit & output BPA-free silicone for safe, flexible comfort Reusable & dishwasher safe for easy 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:** € 20.13
**Availability:** ✅ In Stock

## Summary

> 🍼 Pump smarter, not harder — comfort that keeps up with you!

## 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?** € 20.13 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/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

- • **Size Matters:** Available in 5 precise sizes to guarantee the perfect fit—because one size never fits all.
- • **Custom Comfort Fit:** Snug 21mm silicone inserts designed to enhance pumping efficiency and reduce discomfort.
- • **Trusted by Thousands:** Join over 300,000 moms who trust Willow for a superior, comfortable pumping experience.
- • **Hygienic & Hassle-Free:** Dishwasher-safe, BPA-free silicone ensures effortless cleaning and safe use every time.
- • **Universal Compatibility:** Seamlessly fits 24mm Willow flanges and reusable containers for versatile pumping sessions.

## Overview

The Willow Breast Pump Sizing Insert in 21mm is a BPA-free, flexible silicone flange insert designed to improve fit and comfort for moms with smaller measurements. Compatible with 24mm Willow breast pump flanges, it’s reusable, dishwasher safe, and available in multiple sizes to optimize milk output and reduce discomfort. Trusted by over 300,000 moms, it’s a must-have accessory for a seamless, hygienic pumping routine.

## 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: love it - very well made, and exact fit, also comfortable and easy to wash
Review: Great for elastic nips - These work great for eufy wearable pump if you have elastic nips!!!

## Features

- Reusable Breast Pump Flange Inserts: Designed to help optimize comfort and output for moms who measure smaller than 21mm
- 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 |
| Best Sellers Rank | #2,258 in Baby ( See Top 100 in Baby ) #117 in Breastfeeding Supplies |
| Customer Reviews | 4.7 4.7 out of 5 stars (1,458) |
| Date First Available  | March 1, 2023 |
| Item model number  | INSERT |
| Manufacturer  | Willow |
| Product Dimensions  | 5 x 1.5 x 5.7 inches; 0.63 ounces |

## 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)

## Customer Reviews

### ⭐⭐⭐⭐⭐ love it
*by C***E on January 7, 2026*

very well made, and exact fit, also comfortable and easy to wash

### ⭐⭐⭐⭐⭐ Great for elastic nips
*by C***O on November 19, 2025*

These work great for eufy wearable pump if you have elastic nips!!!

### ⭐⭐⭐⭐⭐ 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.

## 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

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---

*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-02-22*