Medela Flange 21mm
FailThe top 5 brands take 100% of clicks, so Medela Flange 21mm is a Fail.
- Flapen Score
- 32 / 100Ranks 2,149 of 2,472 Baby Products niches · −12 vs the category median of 4432
- Market size
- $49K/yr20K searches / yr
- 90-day growth
- -5.1%search demand this quarter
- Competition
- 93%top-5 click share · 4 brands · 16 sellers
Flapen Score
Medela Flange 21mm against its category
The dotted line is the Baby Products average. Past it, Medela Flange 21mm is stronger. Inside it, weaker.
Market
The Medela Flange 21mm market on Amazon at a glance
Shoppers on Amazon United States searched for Medela Flange 21mm 20K times last year and spent an estimated $49K. All 4 brands take every click. Flapen scores it 32 out of 100, a Fail.
01 · Demand
An estimated 16.0% of those searches ended in a purchase.
Shoppers searched for this 20K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 16.0% of those searches ended in a purchase. Searches in the last 90 days moved -5.1% against the 90 days before. Searches, conversion and average price together put the market at an estimated $49K a year.
- Searches, last 12 months
- 20K
- Growth, 90 days vs prior 90
- -5.1%
- Conversion, latest week
- 16.0%
- Market size, estimated
- $49Ka year
- Peak month
- July1.3× the quietest month
- Top search term
- medela 21mm flange8K searches a year
02 · Price
A sale here is worth $15.22.
Listings sell for $15.22 on average, from $12.04 to $24.08. Amazon reports units sold in ranges. This niche sold 3K to 4K a year. The average listing sells 500 to 750 of them. At $15.22 that is $8K to $11K a year per listing.
- Average price
- $15.22inside the $15 to $100 sweet spot
- Price range
- $12.04–$24.08
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 3K–4K
- Units per listing a year
- 500–750
- Revenue per listing a year
- $8K–$11K
- Returns
- 5.1%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is reviews.
71% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 0.0% of listings are out of stock. The average listing ranks #63 within Breastfeeding. It carries 7,020 reviews at 4.43 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 71%
- Prime listings
- 100%
- Out of stock, average day
- 0.0%
- Average rank
- #63in Breastfeeding
- Average rating
- 4.43 starsAmazon United States average 4.42 stars
- Average reviews
- 7,020per listing
- Listings tracked
- 7
04 · Newcomers
Brands here are settling in.
The brands on the shelf have sold for 41 months on average, so the names here are settling in.
- Launched, last 12 months
- 0
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 41 months
Products
Top Medela Flange 21mm products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 12, 2026. The live listing can differ.
Top sellers
by estimated 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
- Price
- $15.64
- Rating
- 4.6/5
- Reviews
- 19,737
- Age
- 7y ago

PumpMom-us 21mm Breast Shields Compatible with Medela Breast Pump Parts Replace Flange Accessories for PersonalFit Freestyle Harmony PersonalFit Flex Breast Shield
- Price
- $13.44
- Rating
- 4.5/5
- Reviews
- 440
- Age
- 3y ago

Medela PersonalFit Breast Shields 2 Pack of Small 21mm Breast Pump Flanges Authentic Medela Spare Parts Made Without BPA
- Price
- $13.88
- Rating
- 4.4/5
- Reviews
- 1,957
- Age
- 19y ago

PumpMom-us 21mm Soft Rim Flanges Compatible with Medela Breast Pump PersonalFit Freestyle Maxflow Freestyle Flex Swing Maxi Connectors Replace 21 Flange Accessories with Wider Opening Angle
- Price
- $12.04
- Rating
- 4.4/5
- Reviews
- 724
- Age
- 3y ago

MOOMentaneous Breast Pump Shields Flanges 21mm Compatible with Medela Breast Pumps PersonalFit Maxflow Freestyle Flex Swing Maxi Connector
- Price
- $12.60
- Rating
- 4.2/5
- Reviews
- 207
- Age
- 1y ago
Trending
estimated 90-day click momentum
PumpMom-us 21mm Breast Shields Compatible with Medela Breast Pump Parts Replace Flange Accessories for PersonalFit Freestyle Harmony PersonalFit Flex Breast Shield
- Price
- $13.44
- Rating
- 4.5/5
- Reviews
- 440
- Age
- 3y ago

MOOMentaneous Breast Pump Shields Flanges 21mm Compatible with Medela Breast Pumps PersonalFit Maxflow Freestyle Flex Swing Maxi Connector
- Price
- $12.60
- Rating
- 4.2/5
- Reviews
- 207
- Age
- 1y ago

Medela Harmony Manual Breast Pump Compact Swiss Design with PersonalFit Flex Shields and Medelas 2-Phase Expression Technology
- Price
- $24.08
- Rating
- 4.5/5
- Reviews
- 21,631
- Age
- 5y ago

Medela PersonalFit Breast Shields 2 Pack of Small 21mm Breast Pump Flanges Authentic Medela Spare Parts Made Without BPA
- Price
- $13.88
- Rating
- 4.4/5
- Reviews
- 1,957
- Age
- 19y ago

PumpMom-us 21mm Soft Rim Flanges Compatible with Medela Breast Pump PersonalFit Freestyle Maxflow Freestyle Flex Swing Maxi Connectors Replace 21 Flange Accessories with Wider Opening Angle
- Price
- $12.04
- Rating
- 4.4/5
- Reviews
- 724
- Age
- 3y ago
Newest
by launch date
MOOMentaneous Breast Pump Shields Flanges 21mm Compatible with Medela Breast Pumps PersonalFit Maxflow Freestyle Flex Swing Maxi Connector
- Price
- $12.60
- Rating
- 4.2/5
- Reviews
- 207
- Age
- 1y ago

Nenesupply 21mm Oval Flanges Compatible with Medela Pump Parts Replacement 21mm Flange for Medela Breast Pumps. Work with Pump in Style Parts Symphony Parts Swing Maxi Harmony and Personalfit Flex
- Price
- $14.85
- Rating
- 4.4/5
- Reviews
- 4,444
- Age
- 3y ago

PumpMom-us 21mm Breast Shields Compatible with Medela Breast Pump Parts Replace Flange Accessories for PersonalFit Freestyle Harmony PersonalFit Flex Breast Shield
- Price
- $13.44
- Rating
- 4.5/5
- Reviews
- 440
- Age
- 3y ago

PumpMom-us 21mm Soft Rim Flanges Compatible with Medela Breast Pump PersonalFit Freestyle Maxflow Freestyle Flex Swing Maxi Connectors Replace 21 Flange Accessories with Wider Opening Angle
- Price
- $12.04
- Rating
- 4.4/5
- Reviews
- 724
- Age
- 3y ago

Medela Harmony Manual Breast Pump Compact Swiss Design with PersonalFit Flex Shields and Medelas 2-Phase Expression Technology
- Price
- $24.08
- Rating
- 4.5/5
- Reviews
- 21,631
- Age
- 5y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 93% of clicks. A locked shelf that new listings rarely crack.
Brands
4 falling
Sellers
16
Est. top-5 brand share
100%
Top 20: 100%
Est. top-5 click share
93%
Top 20: 100%
Open market
0%
- Medela61%
- PUMPMOM-US28%
- MOOMentaneous6%
- NENESUPPLY4%
- Open — no brand owns it (0%)
Demand
Medela Flange 21mm search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.3×
Search terms
Top Medela Flange 21mm search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- medela 21mm flange8K/yr
- medela flange 21mm6K/yr
- medela flanges 21mm3K/yr
- medela hand pump 21mm flange2K/yr
- 21 mm flange medela2K/yr
Reviews and returns
What reviews say buyers love and hate about Medela Flange 21mm
We read the reviews and the return reasons for every product selling here.
“Didnt work”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
18 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Medela Flange 21mm questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









