flange measurement tool
Skip itBrand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Conversion
Great9.5%search→purchase rate — share of searches ending in a sale
Market size
Great$1000K$1000K/yr · 1.2M searches
Review moat
Okay1,791.5avg incumbent reviews — the moat a new listing must climb
Returns
Okay3.2%return rate — above 5% kills the launch gate
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Avg price
Bad$8.80avg listing price — sweet spot $15–$100
Growth
Bad-3.3%90-day search growth — must beat 0% to launch
Competition
Bad91%top-5 click share — a locked-up shelf
Brand share
Bad100%top-5 brand share — brand-locked demand
Price range
Bad$5.68–$10.05cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United States niche tracking, flange measurement tool is a $1000K/yr Amazon United States market (1.2M searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Apr–May–Jun. Verdict: Skip it — 37/100.
Data updated Jul 12, 2026 · scored weekly · How we score niches
flange measurement tool market data
- Units sold / yr
- 100K–125K
- avg 15,000–20,000/product
- Revenue / yr
- $880K–$1.1M
- units × avg price
- Conversion rate
- 9.5%
- Avg BSR
- #34
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 88%
- Out of stock
- 0.0%
- Avg brand age
- 42 months
- Avg seller age
- 147 days
Competition & brand share
The top 5 products capture 91% of clicks — a locked-up shelf that new listings rarely crack.Brands
5 rising
Sellers
10
Top-5 brand share
100%
Top 20: 100%
Top-5 click share
91%
Top 20: 100%
Open market
0%
- Nuliie45%
- Nursi Luna44%
- LOTBILL5%
- Momcozy4%
- GOCROWEEN3%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -3.3% search growth over the last 90 days.Peak months: Apr, May, Jun · busiest ÷ quietest = 3.3×
Top flange measurement tool search terms
- flange sizing kit376K/yr
- flange inserts135K/yr
- spectra flange inserts106K/yr
- flange inserts for spectra147K/yr
- breast pump flange insert72K/yr
- flanges for breast pump46K/yr
- nipple flange sizing kit33K/yr
- flange sizing kit spectra30K/yr
- silicone flange insert30K/yr
- spectra s1 flange inserts17K/yr
Top flange measurement tool products on Amazon
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
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 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
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
Flange Insert 13/15/17/19/21mm 10PCS Compatible with Momcozy S12 Pro/S9 Pro/S12/S9/Medela/Spectra etc Electric Breast Pump 24mm Flange/Shield Reduce 24mm Tunnel Down to Correct Size
LOTBILL$7.344.6★583 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
Newest
by launch date
Nuliie 5-in-1 Flange Sizing Kit 12/14/16/18/20mm for 24mm Flange/Shield of Most Pumps 10PCS Silicone Flange Inserts to Boost Pumping Efficiency & Comfort BPA-Free Pump Essential for Moms
Nuliie$9.90445 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
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 momentumNuliie 5-in-1 Flange Sizing Kit 12/14/16/18/20mm for 24mm Flange/Shield of Most Pumps 10PCS Silicone Flange Inserts to Boost Pumping Efficiency & Comfort BPA-Free Pump Essential for Moms
Nuliie$9.904.5★
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
Nursi Luna$10.054.6★
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★
Flange Insert 13/15/17/19/21mm 10PCS Compatible with Momcozy S12 Pro/S9 Pro/S12/S9/Medela/Spectra etc Electric Breast Pump 24mm Flange/Shield Reduce 24mm Tunnel Down to Correct Size
LOTBILL$7.344.6★
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★
What buyers say about flange measurement tool
What buyers praise and complain about, mined from review topics.What buyers love
“Like the sizer”
“One thing that really stood out to me was how well-made”
“This made it so easy for me”
“Good price”
“So comfortable”
“The little cleaning sponge is wonderful”
“Exactly What I Needed”
“Very helpful and useful for breastfeeding”
“Compatible with Frida Mom manual pump”
“durable”
What buyers complain about
“Does NOT fit”
“Poor quality”
“they are kind of a pain to insert and clean and the output isnt as good as just using the correct size pump accessory”
“Incompatible with Elvie Stride”
“one of the flange inserts tore right apart immediately after opening”
“Very uncomfortable”
“Waste of money”
“These are different the last time I bought them I dont like the material”
“its a little awkward to handle at first”
“Too sticky; nipple can move”
Top return reasons
Common questions
- Is flange measurement tool profitable to sell on Amazon United States?
- The niche generates $1000K/yr across 8 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -3.3%. Flapen's verdict: Skip it (37/100).
- How competitive is the flange measurement tool niche?
- 5 brands and 10 sellers compete. The top 5 products take 91% of clicks and top 5 brands hold 100% of demand.
- What do buyers complain about in flange measurement tool?
- Top complaints mined from reviews: Size-Overall, Quality-Overall, Ease Of Cleaning. The return rate is 3.2%.
- When does demand for flange measurement tool peak?
- Demand peaks in Apr–May–Jun; the busiest month runs 3.3× the quietest.
- What does it cost to enter the flange measurement tool niche?
- Listings span $5.68–$10.05; the average listing price is $8.80 (sweet spot $15–$100). The average incumbent carries 1,792 reviews — the moat a new listing must climb.