lansinoh flange inserts
Skip itPrices mostly outside the sweet spot ($7.75–$13.81) — this niche doesn't clear our bar today.
Conversion
Great7.6%search→purchase rate — share of searches ending in a sale
Returns
Okay3.1%return rate — above 6% kills the launch gate
Review moat
Okay2,151.38avg incumbent reviews — the moat a new listing must climb
Avg price
Okay$9.88avg listing price — sweet spot $15–$100
Quality gap
Bad4.6★avg incumbent rating — lower means beatable quality
Growth
Bad-9.1%90-day search growth — must beat 0% to launch
Market size
Bad$41K$41K/yr · 55K searches
Competition
Bad88%top-5 click share — a locked-up shelf
Brand share
Bad97%top-5 brand share — brand-locked demand
Price range
Bad$7.75–$13.81cheapest to priciest tracked listing — scored on the share inside $15–$100
Competition
The top 5 products capture 88% of clicks — a locked-up shelf that new listings rarely crack.Brands
6 falling
Sellers
10
Top-5 brand share
97%
Open market
0%
- Lansinoh59%
- Nursi Luna16%
- Nuliie13%
- Luxemum5%
- BDICOVE4%
- Maymom3%
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 8 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Lansinoh ComfortFit Breast Pump Flanges Size 21mm 2 Count
Lansinoh$7.754.6★3,697 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$9.684.6★4,179 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
Lansinoh ComfortFit Breast Pump Flanges Size 28mm 2 Count
Lansinoh$11.854.6★3,697 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$9.874.6★2,081 rev
Newest
by launch date
4Pcs Breast Pump Flange Insert 19mm Compatible with Momcozy/Spectra/Medela/eufy/Elvie/Lansinoh/Paruu P10 Breast Pump Fit for Momcozy M5/M9/M6/V2 Pro/V2 pro/S12 Pro/eufy E10 S1 S1 Pro 24mm Flange
BDICOVE$7.90635 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
Flange Inserts 13/15/17/19/21mm for 24mm Flange/Shield of Most Pumps Compatible with Momcozy KISSBOBO Lansinoh Elvie Willow go Spectra Medela Freestyle Flex Pump Shields10PCS
Luxemum$8.13221 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
Trending
90-day click momentum4Pcs Breast Pump Flange Insert 19mm Compatible with Momcozy/Spectra/Medela/eufy/Elvie/Lansinoh/Paruu P10 Breast Pump Fit for Momcozy M5/M9/M6/V2 Pro/V2 pro/S12 Pro/eufy E10 S1 S1 Pro 24mm Flange
BDICOVE$7.904.5★
Lansinoh ComfortFit Breast Pump Flanges Size 28mm 2 Count
Lansinoh$11.854.6★
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★
Maymom Compatible 17mm Breastshield Flange for Lansinoh Breastpump & Valve. Not Original Lansinoh Pump Parts. Replace Lansinoh Flange ComfortFit. Work with Lansinoh SignaturePro SmartPump Manual Pumps
Maymom$13.814.8★
Lansinoh ComfortFit Breast Pump Flanges Size 21mm 2 Count
Lansinoh$7.754.6★
Demand & seasonality
Weekly Amazon search volume, last 70 weeks — -9.1% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.4×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“The sizing was accurate”
“One thing that really stood out to me was how well-made”
“So comfortable”
“Great price”
“Easy to use”
“The little cleaning sponge is wonderful”
“Very helpful and useful for breastfeeding”
“Durable, comfortable”
“It performs exactly as intended”
“Compatible with Frida Mom manual pump”
What buyers complain about
“These are huge”
“Poor quality”
“one of the flange inserts tore right apart immediately after opening”
“Very uncomfortable”
“Incompatible with Elvie Stride”
“Waste of money”
“Doesnt work for me”
“Why did these come dirty”
“Recieved used product. Hair and lint”
“Horrible product, pieces missing, and some pieces broken”