Is 40b bra profitable to sell on Amazon United States?

The niche generates $41K/yr across 113 tracked products. 12 of 39 products launched in the last 360 days are still selling. 90-day search growth is +11.4%. Flapen's verdict: Worth a look (53/100).

How competitive is the 40b bra niche?

38 brands and 89 sellers compete. The top 5 products take 19% of clicks and top 5 brands hold 43% of demand.

What do buyers complain about in 40b bra?

Top complaints mined from reviews: Size-Overall, Strap/String Quality, Quality-Overall. The return rate is 10.1% — above our launch gate.

When does demand for 40b bra peak?

Demand is steady year-round — the busiest month runs 1.5× the quietest.

What does it cost to enter the 40b bra niche?

Listings span $11.29–$65.40; the average listing price is $20.53 (sweet spot $15–$100). The average incumbent carries 8,203 reviews — the moat a new listing must climb.

40b bra

Worth a look

Shows a fragmented shelf (top 5 take 19% of clicks), but high returns (10.1%) keeps it on the watch list.

Competition

Incredible19%

top-5 click share — an open shelf

Brand share

Great43%

top-5 brand share — no brand owns this niche

Price range

Great$11.29–$65.40

cheapest to priciest tracked listing — scored on the share inside $15–$100

Avg price

Great$20.53

avg listing price — sweet spot $15–$100

Quality gap

Great4.1★

avg incumbent rating — lower means beatable quality

Growth

Okay+11.4%

90-day search growth — must beat 0% to launch

Conversion

Okay2.3%

search→purchase rate — share of searches ending in a sale

Review moat

Bad8,202.63

avg incumbent reviews — the moat a new listing must climb

Market size

Bad$41K

$41K/yr · 88K searches

Returns

Bad10.1%

return rate — above 5% kills the launch gate

Signals No Dominant Brand High Returns

According to Flapen's Amazon United States niche tracking, 40b bra is a $41K/yr Amazon United States market (88K searches/yr). The top 5 brands hold 43% of demand. Verdict: Worth a look — 53/100.

Data updated Jul 13, 2026 · scored weekly · How we score niches

40b bra market data

Units sold / yr: 2K–3K; avg 0–100/product
Revenue / yr: $41K–$51K; units × avg price
Conversion rate: 2.3%
Avg BSR: #433
Page quality: 0%
Prime: 98%
Sponsored: 85%
Out of stock: 3.6%
Avg brand age: 47 months
Avg seller age: 143 days

Competition & brand share

Clicks spread well past the top 5 (19% combined) — an open shelf where new products get seen.

Brands

38 rising

Sellers

Top-5 brand share

43%

Top 20: 90%

Top-5 click share

19%

Top 20: 48%

Open market

51%

Maidenform11%
Warner's11%
Bali8%
As Fairy7%
Cuteio6%
Vertvie6%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +11.4% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.5×

Open Trend

Top 40b bra search terms

40b bra22K/yr +16.4%1.8% conv.
bra 40b18K/yr +10.3%2.5% conv.
40 b bra13K/yr +43.0%1.5% conv.
40b bras for women push up11K/yr +6.8%1.5% conv.
40b push up bra8K/yr -1.5%1.9% conv.
bras 40b6K/yr -8.6%2.5% conv.
bra 40 b5K/yr -7.5%1.6% conv.
size 40b bras for women5K/yr -7.3%1.8% conv.

All search terms

Top 40b 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

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

3Pcs Set Everyday Bra for Women T-Shirt Push Up Underwear with Support Anti-Sag Causal Comfortable Lingerie

Mourzaor$17.434.0★804 rev

Warners Womens Blissful Benefits Side Smoothing Underwire Bra Toasted Almond 40B

Warner's$14.014.4★13,737 rev

DOBREVA Womens Push Up Lace Bra Underwire Plunge Full Coverage Bras Sexy Plus Size Support Black 40B

DOBREVA$25.074.3★2,668 rev

Warners Womens Blissful Benefits Ultrasoft Wirefree Bra Butterscotch 40B

Warner's$15.364.5★24,598 rev

Newest

by launch date

Bali Womens One Smooth U Ultra Light Illusion Neckline Underwire Bra Nude 40B

Bali$19.5842,643 rev

2mo ago

Bali Womens One Smooth U Ultra Light Illusion Neckline Underwire Bra White 40B

Bali$21.3042,643 rev

2mo ago

Vertvie 2026 Womens Wireless Jelly Bras Push Up Cup-Engineered Support Deep V Lift Bra Seamless No Underwire T-Shirt Bralette(Nude Leopard 40B)

Vertvie$19.04263 rev

5mo ago

Vertvie Jelly Bras for Women Plus Size Minimizer Soft Wireless Push Up Bra Full Supportive Older Lift Back Coverage Bralette(Leopard Pink 40B)

Vertvie$19.964,544 rev

6mo ago

3PC Pack Bras for Women Push up t Shirt Bra Set Womens Underwear with Support Anti-Sag Underwire Padded Everyday Comfortable

Dpizgic$19.1159 rev

9mo ago

What buyers say about 40b bra

What buyers praise and complain about, mined from review topics.

What buyers love

Comfort-Overall39%

“Extremely comfortable”

Size-Overall16%

“Fits like a glove”

Soft Feel9%

“buttery soft”

Quality-Overall4%

“Good Quality”

Value For Money3%

“Worth it”

Strap/String Quality3%

“Straps are great”

Material Quality2%

“comfortable material,”

Color2%

“The colors are cute”

Shape/Style1%

“Flattering”

Chest Fit1%

“the bra feels like it is comfortably supporting your chest”

What buyers complain about

Size-Overall25%

“Didn't fit”

Strap/String Quality6%

“My back strap broke off completely”

Quality-Overall5%

“Not well made”

Comfort-Overall5%

“I find this bra uncomfortable”

Chest Fit4%

“made way to small for big bust”

Durability4%

“Doesn't last”

Advertised Vs Actual Product3%

“False advertising”

Shape/Style2%

“This did not hold its shape”

Material Quality1%

“The material ended up not being great”

Product Condition1%

“received an used one”

Top return reasons

Size-Overall59%

Chest Fit22%

Comfort-Overall3%

Advertised Vs Actual Product2%

Shape/Style2%

Material Quality1%

Cushion1%

Color1%

Strap/String Quality1%

Width1%

Common questions

Is 40b bra profitable to sell on Amazon United States?: The niche generates $41K/yr across 113 tracked products. 12 of 39 products launched in the last 360 days are still selling. 90-day search growth is +11.4%. Flapen's verdict: Worth a look (53/100).
How competitive is the 40b bra niche?: 38 brands and 89 sellers compete. The top 5 products take 19% of clicks and top 5 brands hold 43% of demand.
What do buyers complain about in 40b bra?: Top complaints mined from reviews: Size-Overall, Strap/String Quality, Quality-Overall. The return rate is 10.1% — above our launch gate.
When does demand for 40b bra peak?: Demand is steady year-round — the busiest month runs 1.5× the quietest.
What does it cost to enter the 40b bra niche?: Listings span $11.29–$65.40; the average listing price is $20.53 (sweet spot $15–$100). The average incumbent carries 8,203 reviews — the moat a new listing must climb.