40c bra
Worth a lookShows a fragmented shelf (top 5 take 22% of clicks), but high returns (10.8%) keeps it on the watch list.
Competition
Great22%top-5 click share — an open shelf
Avg price
Great$20.72avg listing price — sweet spot $15–$100
Quality gap
Great4.1★avg incumbent rating — lower means beatable quality
Price range
Great$9.86–$41.70cheapest to priciest tracked listing — scored on the share inside $15–$100
Brand share
Great57%top-5 brand share — no brand owns this niche
Growth
Okay+20.0%90-day search growth — must beat 0% to launch
Review moat
Bad17,414.03avg incumbent reviews — the moat a new listing must climb
Conversion
Bad0.8%search→purchase rate — share of searches ending in a sale
Market size
Bad$32K$32K/yr · 202K searches
Returns
Bad10.8%return rate — above 5% kills the launch gate
According to Flapen's Amazon United States niche tracking, 40c bra is a $32K/yr Amazon United States market (202K searches/yr). The top 5 brands hold 57% of demand. Verdict: Worth a look — 50/100.
Data updated Jul 13, 2026 · scored weekly · How we score niches
40c bra market data
- Units sold / yr
- 3K–3K
- avg 0–100/product
- Revenue / yr
- $52K–$62K
- units × avg price
- Conversion rate
- 0.8%
- Avg BSR
- #324
- Page quality
- 0%
- Prime
- 99%
- Sponsored
- 84%
- Out of stock
- 0.0%
- Avg brand age
- 43 months
- Avg seller age
- 146 days
Competition & brand share
Clicks spread well past the top 5 (22% combined) — an open shelf where new products get seen.Brands
37 rising
Sellers
84
Top-5 brand share
57%
Top 20: 91%
Top-5 click share
22%
Top 20: 47%
Open market
38%
- PLAYTEX25%
- Wingslove12%
- Bali8%
- Cuteio6%
- LetsJoli5%
- Glamorise5%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +20.0% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.3×
Top 40c bra search terms
- playtex 4745 bra16K/yr
- 40c bra19K/yr
- underscore bras for women15K/yr
- playtex 18 hour bras15K/yr
- bra 40c16K/yr
- playtex underwire bras for women12K/yr
- 40 c bra12K/yr
- playtex bra 474512K/yr
- playtex cross your heart bras for women15K/yr
- playtex wireless bras for women13K/yr
Top 40c bra 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 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
PLAYTEX Womens 18 Hour Ultimate Lift and Support Wire Free Us4745 Available in Single 2-Packs Bras Nude 40D US
PLAYTEX$14.034.3★92,357 rev
Wingslove Womens Full Coverage Non Padded Comfort Minimizer Wire-Free Bra Plus Size(Black 38DD)
Wingslove$17.804.2★21,810 rev
Cuteio Wireless Jelly Bras for Women No Underwire with Support - Seamless Wirefree Bralettes Everyday Full Coverage Comfort Tshirt Padded Bra Nude L
Cuteio$15.284.2★2,082 rev
PoseFree Jelly Wireless Bra for Women Plus Size Older Women - Full Coverage with Full Support & Lift - No Underwire Back Smoothing Soft Comfort Everyday Bra (Nude XL)
PoseFree$18.374.0★15,900 rev
PLAYTEX Womens 18 Hour Original Comfort Strap Full Coverage Us4693 Available in Single and 2-Packs Bras White 38D US
PLAYTEX$14.154.3★81,008 rev
Newest
by launch date
Fruit of the Loom womens T-shirt T Shirt Bra Black Hue/Sand/White 40C US
Fruit of the Loom$26.7959,690 rev
Bali womens Lace N Smooth Stretch Lace Underwire Df3432 Bras Rosewood 40C US
Bali$18.239,490 rev
Bali Womens One Smooth U Ultra Light Illusion Neckline Underwire Bra Nude 40C
Bali$19.6642,643 rev
Bali womens Bali Womens One Smooth U Ultra Light Convertible Df3439 Bras Black 40C US
Bali$21.2742,643 rev
LetsJoli Jelly Bras for Women Push Up Bra Wireless No Underwire Supportive Full Coverage Plus Size for Older Women(Leopard Pink L)
LetsJoli$19.6216,468 rev
Trending
90-day click momentum
Vertvie Jelly Bras for Women Plus Size Minimizer Soft Wireless Push Up Bra Full Supportive Older Lift Back Coverage Bralette(Skin 38DD)
Vertvie$18.804.1★
Felina Marvelous Side Smoothing T-Shirt Bra (Warm Nude 36DDD) | Seamless Comfortable Everyday Bra with Support & Lift
Felina$39.403.6★
LetsJoli Jelly Bras for Women Push Up Bra Wireless No Underwire Supportive Full Coverage Plus Size for Older Women(Leopard Pink L)
LetsJoli$19.624.1★
Bali womens Lace N Smooth Stretch Lace Underwire Df3432 Bras Rosewood 40C US
Bali$18.234.2★
Maidenform Womens Natural Boost Demi Bra 09428 Black 40C
Maidenform$18.144.2★
What buyers say about 40c bra
What buyers praise and complain about, mined from review topics.What buyers love
“Extremely comfortable”
“Comfort fit”
“The material is soft and breathable”
“the product is satisfactory”
“Good price”
“Nice wide straps”
“Good material”
“support for the chest”
“the color is accurate”
“The material was of nice material and stretchy”
What buyers complain about
“Runs large”
“Straps don't stay put”
“Large chest, no way”
“I find this bra uncomfortable”
“Not well made”
“Broke”
“Not as Advertised”
“Not flattering”
“Not a good value for the money”
“it is stretched out”
Top return reasons
Common questions
- Is 40c bra profitable to sell on Amazon United States?
- The niche generates $32K/yr across 104 tracked products. 13 of 33 products launched in the last 360 days are still selling. 90-day search growth is +20.0%. Flapen's verdict: Worth a look (50/100).
- How competitive is the 40c bra niche?
- 37 brands and 84 sellers compete. The top 5 products take 22% of clicks and top 5 brands hold 57% of demand.
- What do buyers complain about in 40c bra?
- Top complaints mined from reviews: Size-Overall, Strap/String Quality, Chest Fit. The return rate is 10.8% — above our launch gate.
- When does demand for 40c bra peak?
- Demand is steady year-round — the busiest month runs 1.3× the quietest.
- What does it cost to enter the 40c bra niche?
- Listings span $9.86–$41.70; the average listing price is $20.72 (sweet spot $15–$100). The average incumbent carries 17,414 reviews — the moat a new listing must climb.