---
product_id: 428185457
title: "Willow Breast Pump Sizing Insert | 19mm for 15mm-17mm Nipple Size | Improve Fit for Willow Wearable Breast Pump Flanges & Containers 24mm Only"
brand: "willow"
price: "RM253"
currency: MYR
in_stock: true
url: https://www.desertcart.com.my/products/428185457-willow-breast-pump-sizing-insert-19mm-for-15mm-17mm-nipple
store_origin: MY
region: Malaysia
---

# Flexible silicone for perfect seal Dishwasher safe & reusable Precision fit for 15-17mm nipples Willow Breast Pump Sizing Insert | 19mm for 15mm-17mm Nipple Size | Improve Fit for Willow Wearable Breast Pump Flanges & Containers 24mm Only

**Brand:** willow
**Price:** RM253
**Availability:** ✅ In Stock

## Summary

> 🍼 Perfect fit, flawless pump — because your comfort can’t wait!

## Quick Answers

- **What is this?** Willow Breast Pump Sizing Insert | 19mm for 15mm-17mm Nipple Size | Improve Fit for Willow Wearable Breast Pump Flanges & Containers 24mm Only by willow
- **How much does it cost?** RM253 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.my](https://www.desertcart.com.my/products/428185457-willow-breast-pump-sizing-insert-19mm-for-15mm-17mm-nipple)

## 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

- • **Seamless Compatibility:** Designed exclusively for Willow Wearable Breast Pump Generations 2 & 3 with 24mm flanges.
- • **Hygienic & Easy Maintenance:** Dishwasher safe silicone insert that’s reusable and simple to clean for busy moms on the go.
- • **Compact & Lightweight Design:** Weighs only 9g and fits discreetly, making your pumping experience effortless and portable.
- • **Tailored Fit for Ultimate Comfort:** Custom sizing insert ensures your Willow pump fits like a glove, reducing leaks and discomfort.
- • **Leak-Proof Confidence Anytime, Anywhere:** Enhance the only fully enclosed, spill-proof wearable pump for pumping freedom without compromise.

## Overview

The Willow Breast Pump Sizing Insert (19mm) is a flexible, lead-free silicone accessory designed to improve fit and comfort for moms with smaller nipples (15-17mm) using the 24mm Willow Wearable Breast Pump flange. Lightweight and dishwasher safe, it ensures leak-proof performance and easy maintenance, exclusively compatible with Willow Generations 2 and 3 pumps.

## Description

Designed for the perfect fit and performance with Willow Wearable Breast Pump. Sizing Inserts make pumping more comfortable for mamas with smaller flange sizes. See size chart in images.

## Features

- IMPROVE FIT & COMFORT FOR YOUR WILLOW PUMP: Designed for the perfect fit and performance with Willow Wearable Breast Pump. Sizing is everything when it comes to pumping performance.
- FLEXIBLE SILICONE: If your flange size is smaller than 21mm, use these sizing inserts with a 24mm Willow Breast Pump flange to improve fit. Reference the sizing guide on this page for sizing instructions.
- EASY ASSEMBLY: Slip them into 24mm flanges or container tunnels for a seamless fit and comfort.
- EASY TO USE: Sizing Inserts are reusable, dishwasher safe and easy to clean. Willow recommends replacing sizing inserts regularly for optimal performance.
- USE WITH WILLOW PUMP: Exclusively designed to work with the Willow Wearable Breast Pump Generations 2 and 3. The only wearable pump that is totally enclosed and spill-proof in any position. Pump whenever you want and wherever you want.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Model Number | INSERT |
| Material | Silicone |
| Material free | Lead Free |
| Care Instructions | Dishwasher Safe |
| Additional product features | Wearable |
| Style | Compact |
| Pump type | Manual |
| Batteries required | No |
| Dishwasher safe | No |
| Product Dimensions | 12.7 x 3.81 x 14.48 cm; 9 g |
| Item model number | INSERT |
| Manufacturer recommended age | 18 months and up |
| Manufacturer | Willow |
| Country of Origin | USA |
| Item Weight | 9 g |

## Product Details

- **Brand:** Willow
- **Operation Mode:** Manual
- **Special Feature:** Wearable
- **Material:** Silicone
- **Material Type Free:** Lead Free
- **Is Dishwasher Safe:** No
- **Style:** Compact
- **Size:** 19mm
- **UPC:** 858298006613
- **Manufacturer:** Willow

## Images

![Willow Breast Pump Sizing Insert | 19mm for 15mm-17mm Nipple Size | Improve Fit for Willow Wearable Breast Pump Flanges & Containers 24mm Only - Image 1](https://m.media-amazon.com/images/I/31LUxe1lEfL.jpg)
![Willow Breast Pump Sizing Insert | 19mm for 15mm-17mm Nipple Size | Improve Fit for Willow Wearable Breast Pump Flanges & Containers 24mm Only - Image 2](https://m.media-amazon.com/images/I/51hgimPoA7L.jpg)
![Willow Breast Pump Sizing Insert | 19mm for 15mm-17mm Nipple Size | Improve Fit for Willow Wearable Breast Pump Flanges & Containers 24mm Only - Image 3](https://m.media-amazon.com/images/I/71HR4gJZuJL.jpg)
![Willow Breast Pump Sizing Insert | 19mm for 15mm-17mm Nipple Size | Improve Fit for Willow Wearable Breast Pump Flanges & Containers 24mm Only - Image 4](https://m.media-amazon.com/images/I/41+Tfn3NCkL.jpg)
![Willow Breast Pump Sizing Insert | 19mm for 15mm-17mm Nipple Size | Improve Fit for Willow Wearable Breast Pump Flanges & Containers 24mm Only - Image 5](https://m.media-amazon.com/images/I/71PxqF3oeYL.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!

## 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

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*Product available on Desertcart Malaysia*
*Store origin: MY*
*Last updated: 2026-01-23*