medela flanges
Skip itBrand-locked demand (top 5 brands take 98% of clicks) — this niche doesn't clear our bar today.
Conversion
Good6.8%search→purchase rate — share of searches ending in a sale
Avg price
Good$13.75avg listing price — sweet spot $15–$100
Price range
Good$8.01–$24.08cheapest to priciest tracked listing — scored on the share inside $15–$100
Market size
Okay$203K$203K/yr · 216K searches
Returns
Okay4.3%return rate — above 6% kills the launch gate
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Competition
Okay66%top-5 click share — leaders hold, buyers still browse
Growth
Okay+2.3%90-day search growth — must beat 0% to launch
Review moat
Bad7,054.67avg incumbent reviews — the moat a new listing must climb
Brand share
Bad98%top-5 brand share — brand-locked demand
Competition
The top 5 products take 66% of clicks — established leaders, but buyers still shop beyond them.Brands
6 falling
Sellers
22
Top-5 brand share
98%
Open market
0%
- Medela42%
- NENESUPPLY24%
- Nursi Luna15%
- PUMPMOM-US12%
- GOCROWEEN6%
- Nuliie2%
Product shelf
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 15 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Medela PersonalFit Flex Breast Shields | 2 Pack of Small 21mm Breast Pump Flanges | Made Without BPA | Shaped Around You for Comfortable and Efficient Pumping
Medela$15.644.6★19,737 rev
Nenesupply 19mm Oval Flanges Compatible with Medela Breast Pump Parts Replace 19mm Medela Flange Accessories. Work with Pump in Style Parts Symphony Parts Swing Maxi Harmony and Personalfit Flex
NENESUPPLY$14.954.4★4,444 rev
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$10.054.6★2,006 rev
19mm Oval Flanges Shields Compatible with Medela Pumps Replacement Parts for Pump in Style Symphony Swing Maxi Harmony and Personalfit FlexBreast Pump Accessories
PUMPMOM-US$13.544.5★440 rev
Flange Inserts 13/15/17/19/21mm 5pcs Suitable for Medela Spectra 24mm Shields/Flanges Compatible with Momcozy S12 Pro/S9 Pro/S9/S12 Wearable Breast Pump Reduce 24mm Tunnel Down to Correct Size
GOCROWEEN$8.014.4★2,046 rev
Newest
by launch date
Medela Compatible Flange Breast Shield Inserts 15mm 18mm 21mm Replacement Accessory Pump Part 2 of Each Size 6PC
Medela$13.8214 rev
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$9.872,081 rev
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$10.052,006 rev
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$9.684,179 rev
Nenesupply 19mm Oval Flanges Compatible with Medela Breast Pump Parts Replace 19mm Medela Flange Accessories. Work with Pump in Style Parts Symphony Parts Swing Maxi Harmony and Personalfit Flex
NENESUPPLY$14.954,444 rev
Trending
90-day click momentumMedela Compatible Flange Breast Shield Inserts 15mm 18mm 21mm Replacement Accessory Pump Part 2 of Each Size 6PC
Medela$13.824.6★
17mm Oval Flanges Shields Compatible with Medela Pumps Replacement Parts for Pump in Style Symphony Swing Maxi Harmony and Personalfit FlexBreast Pump Accessories
PUMPMOM-US$13.574.5★
Medela PersonalFit Flex Breast Shields | 2 Pack of Small 27mm Breast Pump Flanges | Made Without BPA | Shaped Around You for Comfortable and Efficient Pumping
Medela$17.984.6★
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$10.054.6★
Nenesupply 15mm Oval Flanges Compatible with Medela Breast Pump Parts Replace 17mm Flange Accessories. Work with Pump in Style Parts Symphony Parts Swing Maxi Harmony and Personalfit Flex Connector
NENESUPPLY$14.934.4★
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +2.3% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.2×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“The best sizing kit”
“Easy to use”
“Good quality”
“The little cleaning sponge is wonderful”
“Good value for money”
“So comfortable”
“Very helpful and useful for breastfeeding”
“Portable”
“Exactly What I Needed”
“Durable”
What buyers complain about
“No longer works”
“These are huge”
“Broke quickly”
“cheaply made”
“Not worth the money”
“They are difficult to clean”
“Very uncomfortable”
“which can be frustrating”
“This does not work for the Swing Maxi”
“Recieved used product. Hair and lint”