flange size measure for nipples
Skip itBrand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Conversion
Incredible12.7%search→purchase rate — share of searches ending in a sale
Returns
Okay3.2%return rate — above 6% kills the launch gate
Review moat
Okay1,699.14avg incumbent reviews — the moat a new listing must climb
Market size
Okay$149K$149K/yr · 153K searches
Quality gap
Okay4.6★avg incumbent rating — lower means beatable quality
Growth
Bad-3.5%90-day search growth — must beat 0% to launch
Avg price
Bad$7.72avg listing price — sweet spot $15–$100
Competition
Bad96%top-5 click share — a locked-up shelf
Brand share
Bad100%top-5 brand share — brand-locked demand
Price range
Bad$4.00–$10.05cheapest 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.
All 7 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
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
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$5.684.3★2,611 rev
Luxemum Nipple Rulers Flange Inserts Sizing Measurement Tool for Breast Pump Soft Silicone Flange Size Measure Nipple Measuring for New Mums/Women
Luxemum$4.004.8★555 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
Newest
by launch date
Munchkin Nipple Ruler Sizing Tool for Nipple Shields and Breast Pump Flanges Helps Breastfeeding Moms Buy The Right Size
Munchkin$4.9281 rev
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$9.86381 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
Luxemum Nipple Rulers Flange Inserts Sizing Measurement Tool for Breast Pump Soft Silicone Flange Size Measure Nipple Measuring for New Mums/Women
Luxemum$4.00555 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
Trending
90-day click momentumMomcozy 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$5.684.3★
Munchkin Nipple Ruler Sizing Tool for Nipple Shields and Breast Pump Flanges Helps Breastfeeding Moms Buy The Right Size
Munchkin$4.924.6★
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★
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★
Luxemum Nipple Rulers Flange Inserts Sizing Measurement Tool for Breast Pump Soft Silicone Flange Size Measure Nipple Measuring for New Mums/Women
Luxemum$4.004.8★
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -3.5% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.5×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“The sizing is also accurate”
“The kit was somewhat easy to use for the most part”
“Great Quality”
“Great price”
“So comfortable”
“The little cleaning sponge is wonderful”
“Exactly What I Needed”
“feels very durable”
“Very helpful and useful for breastfeeding”
“Compatible with Frida Mom manual pump”
What buyers complain about
“These are huge”
“Poor quality”
“It feels a bit pricey for something youll only use a few times”
“Very uncomfortable”
“one of the flange inserts tore right apart immediately after opening”
“Incompatible with Elvie Stride”
“they are kind of a pain to insert and clean and the output isnt as good as just using the correct size pump accessory”
“its a little awkward to handle at first”
“These are different the last time I bought them I dont like the material”
“Doesnt work for me”