Breast Flange Converter Inserts 13–21mm Soft Silicone + Size Guide

Get the perfect fit every time you pump with this Soft Silicone Breast Flange Converter Insert Set. Designed for breastfeeding mothers who need a smaller, more comfortable flange size, this set includes five sizes — 13mm, 15mm, 17mm, 19mm, and 21mm — so you can easily find the ideal fit for your nipple size and maximize milk output.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Why a Proper Flange Fit Matters

Using an ill-fitting breast pump flange can lead to discomfort, nipple pain, and reduced milk flow. According to the CDC's breastfeeding resources, proper breast pump fit is key to a successful pumping experience. These soft silicone inserts slide directly into your existing pump flanges, instantly reducing the tunnel diameter to a more comfortable, snug fit — no need to buy an entirely new flange set.

Made in Mainland China.

What's Included

• ✅ 10 Silicone Flange Inserts — 2 pcs each of 13mm, 15mm, 17mm, 19mm, and 21mm
• 📏 1 x Nipple Measuring Card — find your correct size quickly
• 📐 1 x Tape Ruler — for accurate nipple diameter measurement
• 🧴 1 x Pacifier/Brush Cleaning Brush (approx. 8.5 × 2.15 cm)

Key Features

• 5 Sizes in 1 Set: Covers 13mm, 15mm, 17mm, 19mm, and 21mm to suit a wide range of nipple sizes
• Soft Silicone Material: Smooth, flexible, and gentle on sensitive skin — nitrosamine-free and body-safe
• Universal Compatibility: Designed to fit most standard breast pump flanges for broad compatibility
• Easy to Use: Simply insert into your existing flange tunnel — no tools or special skills needed
• Nipple Size Guide Included: Take the guesswork out of sizing with the included measuring card and ruler
• Portable & Travel-Ready: Compact and lightweight — use at home, work, hospital, or on the go
• Easy to Clean: Smooth silicone surface is simple to wash and maintain

Specifications

You May Also Like

Browse more personal care and wellness essentials in our store:

• Laneige Lip Sleeping Mask – Intense Hydration with Vitamin C
• Curl Defining Mousse – Anti-Frizz Bouncy Cream

Note: Please allow ±1–2 cm variance due to manual measurement. Slight color differences may occur due to different display settings.

Learn more: Breast pump

Frequently Asked Questions

Q: What sizes are included in this breast flange converter insert set?

A: The set includes soft silicone inserts in five sizes: 13mm, 15mm, 17mm, 19mm, and 21mm. You receive 2 pieces of each size, giving you 10 inserts total. A nipple measuring card and tape ruler are also included to help you find your correct size.

Q: Are these silicone flange inserts safe to use while breastfeeding?

A: Yes. The inserts are made from soft, flexible silicone that is nitrosamine-free and free from high-concern chemicals, making them safe for use in breast pump equipment during breastfeeding.

Q: Will these flange converter inserts fit my breast pump?

A: These inserts are designed to fit inside most standard breast pump flanges. They reduce the inner tunnel diameter of your existing flanges, allowing mothers who require a smaller opening size to pump more comfortably and efficiently without purchasing a new pump.

Q: How do I know which size flange insert to use?

A: Use the included measuring card and tape ruler to measure your nipple diameter (not the areola). The correct insert should allow your nipple to move freely in and out of the tunnel without rubbing on the sides. A well-fitted flange helps improve comfort and milk flow. For more guidance on breastfeeding and pumping, visit CDC Breastfeeding Resources.