---
title: "flange size measure for nipples — Niche Verdict: Skip it (29/100) | Amazon United States - Flapen"
canonical_url: "https://flapen.com/amazon/research/us/baby-products/flange-size-measure-for-nipples"
last_updated: "2026-07-14T00:54:20.389Z"
locale: en
meta:
  description: "brand-locked demand (top 5 brands take 100% of clicks) — flange size measure for nipples doesn't clear our bar today."
  "og:description": "brand-locked demand (top 5 brands take 100% of clicks) — flange size measure for nipples doesn't clear our bar today."
  "og:title": "flange size measure for nipples — Niche Verdict: Skip it (29/100) | Amazon United States - Flapen"
---

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# **flange size measure for nipples**

**Skip it**

Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.

Market size 32Growth 23Conversion 95Competition 3Returns 49Price range 0Avg price 21Brand share 0Review moat 48Quality gap 27

**Conversion**

**Incredible****12.7%**

search→purchase rate — share of searches ending in a sale

**Returns**

**Okay****3.2%**

return rate — above 6% kills the launch gate

**Review moat**

**Okay****1,699.14**

avg incumbent reviews — the moat a new listing must climb

**Market size**

**Okay****$149K**

$149K/yr · 153K searches

**Quality gap**

**Okay****4.6★**

avg incumbent rating — lower means beatable quality

**Growth**

**Bad****-3.5%**

90-day search growth — must beat 0% to launch

**Avg price**

**Bad****$7.72**

avg listing price — sweet spot $15–$100

**Competition**

**Bad****96%**

top-5 click share — a locked-up shelf

**Brand share**

**Bad****100%**

top-5 brand share — brand-locked demand

**Price range**

**Bad****$4.00–$10.05**

cheapest to priciest tracked listing — scored on the share inside $15–$100

## **Competition**

The top 5 products capture 96% of clicks — a locked-up shelf that new listings rarely crack.

**Brands**

**5 **—flat

**Sellers**

**9**

**Top-5 brand share**

**100%**

**Open market**

**0%**

- Nursi Luna42% - Momcozy25% - Luxemum20% - Nuliie11% - Munchkin2%

## **Product shelf**

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

0%10%$15K20%$30K30%$45K40%$60K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 7 tracked products in this niche — three views at once, no toggling.

### **Top sellers**

by 90-day click share

[1![Nursi Luna Flange Sizing Kit 3-in-1 with 13/15/17/19/21mm for 24mm Electric Breast Pump Flanges/Shields 10PCS Soft Silicone Flange Inserts for More Comfortable Pumping BPA-Free Essential for Moms](https://m.media-amazon.com/images/I/41TicDjnz7L.jpg)**Nursi Luna Flange Sizing Kit 3-in-1 with 13/15/17/19/21mm for 24mm Electric Breast Pump Flanges/Shields 10PCS Soft Silicone Flange Inserts for More Comfortable Pumping BPA-Free Essential for Moms**Nursi Luna**$9.87**4.6★2,081 rev](https://www.amazon.com/dp/B0CY81WHD5) [2![Momcozy Nipple Ruler for Flange Sizing Soft & Flexible Silicone Measurement Tool for Breast Pump Sizing Compatible with Momcozy Medela Spectra Lansinoh Easy to Use for Comfortable Pumping](https://m.media-amazon.com/images/I/41mROvUC4wL.jpg)**Momcozy Nipple Ruler for Flange Sizing Soft & Flexible Silicone Measurement Tool for Breast Pump Sizing Compatible with Momcozy Medela Spectra Lansinoh Easy to Use for Comfortable Pumping**Momcozy**$5.68**4.3★2,611 rev](https://www.amazon.com/dp/B0CBT9ZJ9T) [3![Luxemum Nipple Rulers Flange Inserts Sizing Measurement Tool for Breast Pump Soft Silicone Flange Size Measure Nipple Measuring for New Mums/Women](https://m.media-amazon.com/images/I/41DTarHbYjL.jpg)**Luxemum Nipple Rulers Flange Inserts Sizing Measurement Tool for Breast Pump Soft Silicone Flange Size Measure Nipple Measuring for New Mums/Women**Luxemum**$4.00**4.8★555 rev](https://www.amazon.com/dp/B0CSRZS8NV) [4![Nuliie 3-in-1 Flange Sizing Kit 13/15/17/19/21mm for 24mm Electric Double Breast Pump Flange/Shield 10PCS Silicone Flange Inserts to Boost Pumping Efficiency & Comfort BPA-Free Essential for Moms](https://m.media-amazon.com/images/I/41Feyi97wML.jpg)**Nuliie 3-in-1 Flange Sizing Kit 13/15/17/19/21mm for 24mm Electric Double Breast Pump Flange/Shield 10PCS Silicone Flange Inserts to Boost Pumping Efficiency & Comfort BPA-Free Essential for Moms**Nuliie**$9.68**4.6★4,179 rev](https://www.amazon.com/dp/B0CMPBBHMZ) [5![Nursi Luna Flange Inserts 10PCS 13/15/17/19/21mm for 24mm Flanges/Shield of Most Pumps Flange Sizing Kit Silicone Flanges Insert Breastfeeding Essentials Kit for New Moms](https://m.media-amazon.com/images/I/415xYbVux6L.jpg)**Nursi Luna Flange Inserts 10PCS 13/15/17/19/21mm for 24mm Flanges/Shield of Most Pumps Flange Sizing Kit Silicone Flanges Insert Breastfeeding Essentials Kit for New Moms**Nursi Luna**$10.05**4.6★2,006 rev](https://www.amazon.com/dp/B0CKZH37FX)

**~~View all top sellers →~~**

### **Newest**

by launch date

[![Munchkin Nipple Ruler Sizing Tool for Nipple Shields and Breast Pump Flanges Helps Breastfeeding Moms Buy The Right Size](https://m.media-amazon.com/images/I/41aN4yZhTeL.jpg)**Munchkin Nipple Ruler Sizing Tool for Nipple Shields and Breast Pump Flanges Helps Breastfeeding Moms Buy The Right Size**Munchkin**$4.92**81 rev1y ago](https://www.amazon.com/dp/B0F1XG3JYR) [![Nursi Luna Flange Sizing Kit with 13/15/17/19/21mm for 24mm Electric Breast Pump Flanges/Shields 10PCS Soft Silicone Flange Inserts for Enhanced Pumping Comfort BPA-Free Pump Essential for Moms](https://m.media-amazon.com/images/I/41PwwubUYYL.jpg)**Nursi Luna Flange Sizing Kit with 13/15/17/19/21mm for 24mm Electric Breast Pump Flanges/Shields 10PCS Soft Silicone Flange Inserts for Enhanced Pumping Comfort BPA-Free Pump Essential for Moms**Nursi Luna**$9.86**381 rev1y ago](https://www.amazon.com/dp/B0DT3QZ6Q2) [![Nursi Luna Flange Sizing Kit 3-in-1 with 13/15/17/19/21mm for 24mm Electric Breast Pump Flanges/Shields 10PCS Soft Silicone Flange Inserts for More Comfortable Pumping BPA-Free Essential for Moms](https://m.media-amazon.com/images/I/41TicDjnz7L.jpg)**Nursi Luna Flange Sizing Kit 3-in-1 with 13/15/17/19/21mm for 24mm Electric Breast Pump Flanges/Shields 10PCS Soft Silicone Flange Inserts for More Comfortable Pumping BPA-Free Essential for Moms**Nursi Luna**$9.87**2,081 rev2y ago](https://www.amazon.com/dp/B0CY81WHD5) [![Luxemum Nipple Rulers Flange Inserts Sizing Measurement Tool for Breast Pump Soft Silicone Flange Size Measure Nipple Measuring for New Mums/Women](https://m.media-amazon.com/images/I/41DTarHbYjL.jpg)**Luxemum Nipple Rulers Flange Inserts Sizing Measurement Tool for Breast Pump Soft Silicone Flange Size Measure Nipple Measuring for New Mums/Women**Luxemum**$4.00**555 rev2y ago](https://www.amazon.com/dp/B0CSRZS8NV) [![Nursi Luna Flange Inserts 10PCS 13/15/17/19/21mm for 24mm Flanges/Shield of Most Pumps Flange Sizing Kit Silicone Flanges Insert Breastfeeding Essentials Kit for New Moms](https://m.media-amazon.com/images/I/415xYbVux6L.jpg)**Nursi Luna Flange Inserts 10PCS 13/15/17/19/21mm for 24mm Flanges/Shield of Most Pumps Flange Sizing Kit Silicone Flanges Insert Breastfeeding Essentials Kit for New Moms**Nursi Luna**$10.05**2,006 rev2y ago](https://www.amazon.com/dp/B0CKZH37FX)

**~~View all new products →~~**

### **Trending**

90-day click momentum

[![Momcozy Nipple Ruler for Flange Sizing Soft & Flexible Silicone Measurement Tool for Breast Pump Sizing Compatible with Momcozy Medela Spectra Lansinoh Easy to Use for Comfortable Pumping](https://m.media-amazon.com/images/I/41mROvUC4wL.jpg)**Momcozy Nipple Ruler for Flange Sizing Soft & Flexible Silicone Measurement Tool for Breast Pump Sizing Compatible with Momcozy Medela Spectra Lansinoh Easy to Use for Comfortable Pumping**Momcozy**$5.68**4.3★**▲ 39%**](https://www.amazon.com/dp/B0CBT9ZJ9T) [![Munchkin Nipple Ruler Sizing Tool for Nipple Shields and Breast Pump Flanges Helps Breastfeeding Moms Buy The Right Size](https://m.media-amazon.com/images/I/41aN4yZhTeL.jpg)**Munchkin Nipple Ruler Sizing Tool for Nipple Shields and Breast Pump Flanges Helps Breastfeeding Moms Buy The Right Size**Munchkin**$4.92**4.6★**▲ 38%**](https://www.amazon.com/dp/B0F1XG3JYR) [![Nursi Luna Flange Sizing Kit 3-in-1 with 13/15/17/19/21mm for 24mm Electric Breast Pump Flanges/Shields 10PCS Soft Silicone Flange Inserts for More Comfortable Pumping BPA-Free Essential for Moms](https://m.media-amazon.com/images/I/41TicDjnz7L.jpg)**Nursi Luna Flange Sizing Kit 3-in-1 with 13/15/17/19/21mm for 24mm Electric Breast Pump Flanges/Shields 10PCS Soft Silicone Flange Inserts for More Comfortable Pumping BPA-Free Essential for Moms**Nursi Luna**$9.87**4.6★**▲ 17%**](https://www.amazon.com/dp/B0CY81WHD5) [![Nursi Luna Flange Inserts 10PCS 13/15/17/19/21mm for 24mm Flanges/Shield of Most Pumps Flange Sizing Kit Silicone Flanges Insert Breastfeeding Essentials Kit for New Moms](https://m.media-amazon.com/images/I/415xYbVux6L.jpg)**Nursi Luna Flange Inserts 10PCS 13/15/17/19/21mm for 24mm Flanges/Shield of Most Pumps Flange Sizing Kit Silicone Flanges Insert Breastfeeding Essentials Kit for New Moms**Nursi Luna**$10.05**4.6★**▲ 14%**](https://www.amazon.com/dp/B0CKZH37FX) [![Luxemum Nipple Rulers Flange Inserts Sizing Measurement Tool for Breast Pump Soft Silicone Flange Size Measure Nipple Measuring for New Mums/Women](https://m.media-amazon.com/images/I/41DTarHbYjL.jpg)**Luxemum Nipple Rulers Flange Inserts Sizing Measurement Tool for Breast Pump Soft Silicone Flange Size Measure Nipple Measuring for New Mums/Women**Luxemum**$4.00**4.8★**▼ 21%**](https://www.amazon.com/dp/B0CSRZS8NV)

**~~View all trending →~~**

## **Demand & seasonality**

Weekly Amazon search volume, last 104 weeks — -3.5% search growth over the last 90 days.

4K3KSpike '25Spike '26 seasonSepDecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.5×

## **Reviews**

What buyers praise and complain about, mined from review topics.

### **What buyers love **

**Size-Overall**27%

*“The sizing is also accurate”*

**Ease Of Use**12%

*“The kit was somewhat easy to use for the most part”*

**Quality-Overall**12%

*“Great Quality”*

**Value For Money**9%

*“Great price”*

**Comfort-Overall**8%

*“So comfortable”*

**Ease Of Cleaning**6%

*“The little cleaning sponge is wonderful”*

**Advertised Vs Actual Product**5%

*“Exactly What I Needed”*

**Durability**4%

*“feels very durable”*

**Breastfeeding Friendly**4%

*“Very helpful and useful for breastfeeding”*

**Compatibility-Overall**2%

*“Compatible with Frida Mom manual pump”*

### **What buyers complain about **

**Size-Overall**30%

*“These are huge”*

**Quality-Overall**7%

*“Poor quality”*

**Value For Money**5%

*“It feels a bit pricey for something youll only use a few times”*

**Comfort-Overall**5%

*“Very uncomfortable”*

**Durability**4%

*“one of the flange inserts tore right apart immediately after opening”*

**Compatibility-Overall**4%

*“Incompatible with Elvie Stride”*

**Ease Of Cleaning**4%

*“they are kind of a pain to insert and clean and the output isnt as good as just using the correct size pump accessory”*

**Ease Of Use**3%

*“its a little awkward to handle at first”*

**Material Quality**3%

*“These are different the last time I bought them I dont like the material”*

**Functionality-Overall**2%

*“Doesnt work for me”*

### **Top return reasons **

**Size-Overall**54%

**Functionality-Overall**9%

**Advertised Vs Actual Product**7%

**Defective Material/Parts**5%

**Material Quality**4%

**Value For Money**3%

**Breastfeeding Friendly**3%

**Comfort-Overall**3%

**Compatibility-Overall**2%

**Quality-Overall**2%