---
title: "Black One Piece — $100K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/black-one-piece"
last_updated: "2026-08-10T08:11:08.583Z"
locale: en
meta:
description: "Niche score 60/100 · $100K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 60/100 · $100K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Black One Piece — $100K/yr Amazon US Niche (2026) - Flapen"
---
# **black one piece**
**Worth a look**
Shows a fragmented shelf (top 5 take 8% of clicks), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 25Growth 79Conversion 4Competition 98Returns 0Price range 88Avg price 95Brand share 95Review moat 51Quality gap 78
**Competition**
**Incredible****8%**
top-5 click share — an open shelf
**Brand share**
**Incredible****36%**
top-5 brand share — no brand owns this niche
**Avg price**
**Incredible****$32.09**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$7.21–$98.48**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Growth**
**Great****+70.5%**
90-day search growth — must beat 0% to launch
**Quality gap**
**Great****4.3★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Good****1,476.59**
avg incumbent reviews — the moat a new listing must climb
**Market size**
**Okay****$100K**
$100K/yr · 1.0M searches
**Conversion**
**Bad****0.3%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Bad****14.3%**
return rate — above 5% kills the launch gate
**Signals**[** No Dominant Brand**](https://flapen.com/research/niches?market=us&signal=no_dominant_brand "Top brand's click share < 20%") [** High Returns**](https://flapen.com/research/niches?market=us&signal=high_returns "Return rate > 5%")
According to Flapen's Amazon United States niche tracking, black one piece is a $100K/yr Amazon United States market (1.0M searches/yr). The top 5 brands hold 36% of demand. Demand peaks in May–Jun–Jul. Verdict: Worth a look — 60/100.
Data updated Jul 14, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **black one piece market data**
- **Units sold / yr**
- **3K–3K**
- avg 0–100/product
- **Revenue / yr**
- **$80K–$96K**
- units × avg price
- **Conversion rate**
- **0.3%**
- **Avg BSR**
- **#670**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **94%**
- **Out of stock**
- **1.4%**
- **Avg brand age**
- **33 months**
- **Avg seller age**
- **158 days**
## **Competition & brand share**
Clicks spread well past the top 5 (8% combined) — an open shelf where new products get seen.
**Brands**
**101 **▲rising
**Sellers**
**141**
**Top-5 brand share**
**36%**
Top 20: 69%
**Top-5 click share**
**8%**
Top 20: 24%
**Open market**
**63%**
- LASLULU8% - SUUKSESS8% - Sexybody7% - HYTENSUN5% - CUPSHE5% - KRLAGAPAS4%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +70.5% search growth over the last 90 days.
50K30KSpike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: May, Jun, Jul · busiest ÷ quietest = 5.3×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/black-one-piece/trend)
## **Top black one piece search terms**
- **high cut one piece swimsuit women**129K/yr+57.8%0.1% conv. - **one piece swimsuit teen**86K/yr+267.1%0.2% conv. - **thong one piece swimsuit**117K/yr+53.3%0.1% conv. - **one piece thong swimsuit women**123K/yr+37.4%0.2% conv. - **low back one piece swimsuit**67K/yr+70.5%0.1% conv. - **high leg one piece swimsuit women**56K/yr+75.0%0.1% conv. - **black one piece**81K/yr+40.2%0.3% conv. - **sexy one piece**55K/yr+50.7%0.1% conv. - **thong one piece swimsuits for women**66K/yr+63.1%0.1% conv. - **cheeky one piece swimsuit**43K/yr+60.0%0.1% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/black-one-piece/search-terms)
## **Top black one piece 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.
0%1%$1K2%$2K3%$3K4%$4K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
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
[1**KRLAGAPAS Womens Black Sexy One Piece Bathing Suit Swimsuit High Cut Cheeky Coverage SW07Black M**KRLAGAPAS**$30.65**3.8★156 rev](https://www.amazon.com/dp/B0CJQ7RS2X) [2**Viottiset Womens Ruched High Cut One Piece Swimsuit Tummy Control Cheeky Bathing Suit Black Large**Viottiset**$28.82**4.3★10,026 rev](https://www.amazon.com/dp/B08S3FM56W) [3**Daci Womens Black High Cut One Piece Swimsuit - Tummy Control Bathing Suit Sexy Brazilian Swimwear 2026 M**Daci**$26.98**4.5★147 rev](https://www.amazon.com/dp/B0FBX1HWVN) [4**Sexybody Women Sexy One Piece Swimsuit Cheeky Thong Ruched Bathing Suit Tummy Control High Cut Crisscross Swim Suits**Sexybody**$28.37**4.7★21 rev](https://www.amazon.com/dp/B0GK5PB6SB) [5**LASLULU Swim Suits for Women 2026 Beach Wear Bikini Sexy Black One Piece Swimsuit V Neck Padded Full Coverage Vacation Outfits(Black Small)**LASLULU**$32.00**4.3★214 rev](https://www.amazon.com/dp/B0DM86K4KP)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**HYTENSUN One Piece Swimsuit for Women Tummy Control Deep V Swim Suits 2026 Backless Cheeky High Cut Thong Bottom Sexy Bathing Suit Cruise Outfit Black M**HYTENSUN**$27.77**17 rev4mo ago](https://www.amazon.com/dp/B0GR9MGJSP) [**HYTENSUN Sexy One Piece Swimsuit for Women Halter Spaghetti Straps Backless Swimwear High Cut Thong Swim Suits 2026 Black XL**HYTENSUN**$30.11**48 rev5mo ago](https://www.amazon.com/dp/B0GL6YPVM1) [**Sexybody Women Sexy One Piece Swimsuit Cheeky Thong Ruched Bathing Suit Tummy Control High Cut Crisscross Swim Suits**Sexybody**$28.37**21 rev5mo ago](https://www.amazon.com/dp/B0GK5PB6SB) [**Sexybody Women Sexy Thong One Piece Swimsuits Cheeky V Neck Bathing Suit Slimming High Cut Backless Swim Suits**Sexybody**$31.75**71 rev5mo ago](https://www.amazon.com/dp/B0GK5LR9Y7) [**SUUKSESS Women Sexy One piece Tummy Control Swimsuit Cutout Backless Slimming Swimwear 2025 Cheeky Side O-Ring Bathing Suit (Black Large)**SUUKSESS**$35.54**227 rev7mo ago](https://www.amazon.com/dp/B0G6JFDR14)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**HYTENSUN One Piece Swimsuit for Women Tummy Control Deep V Swim Suits 2026 Backless Cheeky High Cut Thong Bottom Sexy Bathing Suit Cruise Outfit Black M**HYTENSUN**$27.77**4.3★**▲ 28%**](https://www.amazon.com/dp/B0GR9MGJSP) [**HYTENSUN Sexy One Piece Swimsuit for Women Halter Spaghetti Straps Backless Swimwear High Cut Thong Swim Suits 2026 Black XL**HYTENSUN**$30.11**4.1★**▲ 23%**](https://www.amazon.com/dp/B0GL6YPVM1) [**LASLULU Swim Suits for Women 2026 Beach Wear Bikini Sexy Black One Piece Swimsuit V Neck Padded Full Coverage Vacation Outfits(Black Small)**LASLULU**$32.00**4.3★**▲ 21%**](https://www.amazon.com/dp/B0DM86K4KP) [**LASLULU Women One Piece Swimsuit Tummy Control Bathing Suit Padded Sweetheart Neck Swim Suits with Cutout Tie Black Medium**LASLULU**$35.20**4.5★**▲ 20%**](https://www.amazon.com/dp/B0G525V885) [**RELLECIGA Womens Royal Blue High Cut Low Back One Piece Thong Swimsuit for Women Size Medium**RELLECIGA**$23.89**4.4★**▲ 19%**](https://www.amazon.com/dp/B0987HNN32)
**~~View all trending →~~**
## **What buyers say about black one piece**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**31%
*“not too tight”*
**Shape/Style**12%
*“Super Flattering”*
**Comfort-Overall**10%
*“SO COMFORTABLE”*
**Quality-Overall**8%
*“This bathing suit is a very good quality”*
**Material Quality**6%
*“Material is comfortable”*
**Color**4%
*“Colors are vibrant”*
**Design-Overall**3%
*“Beautiful Design”*
**Value For Money**2%
*“Worth It”*
**Advertised Vs Actual Product**2%
*“As described”*
**Stretchability/Expandability/Elasticity**2%
*“Good stretch”*
### **What buyers complain about **
**Size-Overall**27%
*“Too big”*
**Quality-Overall**5%
*“This bathing suit is poor quality”*
**Chest Fit**5%
*“tight fit for my bust”*
**Strap/String Quality**3%
*“the strap broke within 10 minutes of use”*
**Color**2%
*“Color fades fast”*
**Material Quality**2%
*“Awful material”*
**Stretchability/Expandability/Elasticity**2%
*“Got stretched out”*
**Comfort-Overall**2%
*“They do kind of dig into my skin”*
**Shape/Style**2%
*“cut was not flattering”*
**Durability**2%
*“did not hold up”*
### **Top return reasons **
**Size-Overall**55%
**Chest Fit**12%
**Length**9%
**Waist Fit**4%
**Shape/Style**4%
**Hip Fit**4%
**Advertised Vs Actual Product**2%
**Material Quality**2%
**Color**1%
**Strap/String Quality**1%
## **Common questions**
- **Is black one piece profitable to sell on Amazon United States?**
- The niche generates $100K/yr across 321 tracked products. 44 of 141 products launched in the last 360 days are still selling. 90-day search growth is +70.5%. Flapen's verdict: Worth a look (60/100).
- **How competitive is the black one piece niche?**
- 101 brands and 141 sellers compete. The top 5 products take 8% of clicks and top 5 brands hold 36% of demand.
- **What do buyers complain about in black one piece?**
- Top complaints mined from reviews: Size-Overall, Quality-Overall, Chest Fit. The return rate is 14.3% — above our launch gate.
- **When does demand for black one piece peak?**
- Demand peaks in May–Jun–Jul; the busiest month runs 5.3× the quietest.
- **What does it cost to enter the black one piece niche?**
- Listings span $7.21–$98.48; the average listing price is $32.09 (sweet spot $15–$100). The average incumbent carries 1,477 reviews — the moat a new listing must climb.
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