flange inserts for breast pump
Skip itPrices mostly outside the sweet spot ($3.38–$12.17) — this niche doesn't clear our bar today.
Returns
Incredible0.0%return rate — above 5% kills the launch gate
Conversion
Great10.5%search→purchase rate — share of searches ending in a sale
Review moat
Good849.5avg incumbent reviews — the moat a new listing must climb
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Brand share
Okay84%top-5 brand share — brands hold most of the demand
Avg price
Bad£8.22avg listing price — sweet spot $15–$100
Competition
Bad75%top-5 click share — a locked-up shelf
Growth
Bad-11.2%90-day search growth — must beat 0% to launch
Market size
Bad£64K£64K/yr · 74K searches
Price range
Bad£3.38–£12.17cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United Kingdom niche tracking, flange inserts for breast pump is a £64K/yr Amazon United Kingdom market (74K searches/yr). The top 5 brands hold 84% of demand. Verdict: Skip it — 41/100.
Data updated Jul 18, 2026 · scored weekly · How we score niches
flange inserts for breast pump market data
- Units sold / yr
- 6K–8K
- avg 250–500/product
- Revenue / yr
- £49K–£66K
- units × avg price
- Conversion rate
- 10.5%
- Avg BSR
- #67
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 93%
- Out of stock
- 3.3%
- Avg brand age
- 35 months
- Avg seller age
- 216 days
Competition & brand share
The top 5 products capture 75% of clicks — a locked-up shelf that new listings rarely crack.Brands
10 rising
Sellers
12
Top-5 brand share
84%
Top 20: 100%
Top-5 click share
75%
Top 20: 100%
Open market
12%
- RAMXCION29%
- Nuliie26%
- Nursi Luna18%
- EOAMGO6%
- semai5%
- BALIME4%
- Open — no brand owns it (4 brands, 12%)
Demand & seasonality
Weekly Amazon search volume, last 53 weeks — -11.2% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.4×
Top flange inserts for breast pump search terms
- flange inserts for breast pump30K/yr
- breast pump flange insert11K/yr
- flange sizing kit8K/yr
- flange5K/yr
- spectra flange inserts3K/yr
- momcozy flange insert5K/yr
- flanges3K/yr
- flange inserts for breast pump medela3K/yr
- breast pump flange3K/yr
- flange inserts3K/yr
Top flange inserts for breast pump 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 14 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Nuliie 10PCS Flange Inserts 13/15/17/19/21mm for 24mm Flange/Shield of Most Pumps BPA Free Inserts Compatible with Momcozy/Spectra/Bellababy/TSRETE/Nuliie Breast Pumps
Nuliie£8.424.3★3,858 rev
RAMXCION Nipple Rulers with 10PCS Flange Inserts 13/15/17/19/21mm Compatible with 24mm Flanges/Shield of Most Breast Pumps Silicone Flange Sizing Breast Pumps Accessories for New Moms (Transparent)
RAMXCION£7.844.5★1,313 rev
Nursi Luna Flange Inserts 10PCS 13/15/17/19/21mm for 24mm Flanges/Shield Flange Sizing Kit Silicone Flanges Insert Breastfeeding Essentials Kit for New Moms
Nursi Luna£8.614.4★1,895 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£8.914.6★1,936 rev
Breast Pump Flange Inserts Set 10pcs Replacement Silicone Cushions in 5 Sizes + Cleaning Brush & Ruler Soft BPA-Free Compatible Pump Parts for Better Fit & Comfort (13/15/17/19/21mm)
EOAMGO£7.704.2★37 rev
Newest
by launch date
Flange Inserts 13/15/17/19/21mm for 24mm Flange/Shield of Most Breast Pump 3-in-1 Breast Cooling Gel Pads & Nipple Rulers - BPA Free Flange Sizing Kit for New Moms (Flange Inserts+Gel Pads)
RAMXCION£9.4514 rev
Nipple Rulers & 10PCS Breast Pump Flange Inserts 13/15/17/19/21mm Compatible with 24mm Flanges/Shield of Most Breast Pumps 2PCS 3-in-1 Hot and Cold Breast Gel Pads Flange Sizing Kit - BPA Free
RAMXCION£10.54348 rev
Momcozy Breast Pump Flange Insert 15mm Only for Momcozy M5/M6/M9 4PC
momcozy£12.17348 rev
Breast Pump Flange Inserts Set 10pcs Replacement Silicone Cushions in 5 Sizes + Cleaning Brush & Ruler Soft BPA-Free Compatible Pump Parts for Better Fit & Comfort (13/15/17/19/21mm)
EOAMGO£7.7037 rev
RAMXCION Nipple Rulers with 10PCS Flange Inserts 13/15/17/19/21mm Compatible with 24mm Flanges/Shield of Most Breast Pumps Silicone Flange Sizing Breast Pumps Accessories for New Moms (Transparent)
RAMXCION£7.841,313 rev
Trending
90-day click momentumNipple Rulers & 10PCS Breast Pump Flange Inserts 13/15/17/19/21mm Compatible with 24mm Flanges/Shield of Most Breast Pumps 2PCS 3-in-1 Hot and Cold Breast Gel Pads Flange Sizing Kit - BPA Free
RAMXCION£10.544.7★
BALIME Flange Inserts 10PCS 13/15/17/19/21mm for 24mm Flange/Shields of All Breast Pump Nipple Measurement Card Compatible with Medela Elvie Momcozy Spectra Jheppbay Bellababy
BALIME£7.844.5★
semai Flange Inserts 13/15/17/19/21mm Compatible with Medela/Momcozy S12 Pro/S9 Pro/S12/S9/Spectra/Elvie 24mm Breast Pump Flanges Reduce 24mm Nipple Tunnel Down to Correct Size 5PCS (NOT 5 Pairs)
semai£7.544.4★
Momcozy Breast Pump Flange Insert 15mm Only for Momcozy M5/M6/M9 4PC
momcozy£12.174.2★
Breast Pump Flange Inserts Set 10pcs Replacement Silicone Cushions in 5 Sizes + Cleaning Brush & Ruler Soft BPA-Free Compatible Pump Parts for Better Fit & Comfort (13/15/17/19/21mm)
EOAMGO£7.704.2★
What buyers say about flange inserts for breast pump
What buyers praise and complain about, mined from review topics.What buyers love
“they fit great”
“EASY TO USE”
“Amazing for breast pumps”
“Good quality flanges with nipple sizing guide”
“I'm more comfortable”
“Compatible with momcozy s12 pro”
“Did the job”
“The cleaning sponge also makes it easy to clean”
“so much cheaper than the original”
“the adjustable as you feel fits best”
What buyers complain about
“Unfortunately, it doesnt fit Elvie 24 mm breast pumps as advertised”
“however it is not compatible with my spectra S1”
“Didn't work for me”
“Very uncomfortable”
“then measured me incorrectly - that caused excessive pain”
“Cheaper that some other options”
Common questions
- Is flange inserts for breast pump profitable to sell on Amazon United Kingdom?
- The niche generates £64K/yr across 14 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is -11.2%. Flapen's verdict: Skip it (41/100).
- How competitive is the flange inserts for breast pump niche?
- 10 brands and 12 sellers compete. The top 5 products take 75% of clicks and top 5 brands hold 84% of demand.
- What do buyers complain about in flange inserts for breast pump?
- Top complaints mined from reviews: Size-Overall, Compatibility-Overall, Functionality-Overall. The return rate is 0.0%.
- When does demand for flange inserts for breast pump peak?
- Demand is steady year-round — the busiest month runs 1.4× the quietest.
- What does it cost to enter the flange inserts for breast pump niche?
- Listings span £3.38–£12.17; the average listing price is £8.22 (sweet spot $15–$100). The average incumbent carries 850 reviews — the moat a new listing must climb.