---
title: "One Shoulder Bikini — $20K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/one-shoulder-bikini"
last_updated: "2026-08-11T21:34:13.412Z"
locale: en
meta:
description: "Niche score 55/100 · $20K/yr market · 275K searches/yr · $28.75 avg price. High returns (20.8%) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 55/100 · $20K/yr market · 275K searches/yr · $28.75 avg price. High returns (20.8%) keeps it on the watch list. Data updated Jul 2026."
"og:title": "One Shoulder Bikini — $20K/yr Amazon US Niche (2026) - Flapen"
---
# **one shoulder bikini**
**Worth a look**
Shows a fragmented shelf (top 5 take 12% of clicks), but high returns (20.8%) keeps it on the watch list.
Market size 5Growth 77Conversion 3Competition 97Returns 0Price range 90Avg price 95Brand share 78Review moat 64Quality gap 72
**Competition**
**Incredible****12%**
top-5 click share — an open shelf
**Avg price**
**Incredible****$28.75**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$13.50–$39.66**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Brand share**
**Great****57%**
top-5 brand share — no brand owns this niche
**Growth**
**Great****+64.6%**
90-day search growth — must beat 0% to launch
**Quality gap**
**Good****4.3★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Good****959.36**
avg incumbent reviews — the moat a new listing must climb
**Market size**
**Bad****$20K**
$20K/yr · 275K searches
**Conversion**
**Bad****0.3%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Bad****20.8%**
return rate — above 5% kills the launch gate
**Signals**[** High Returns**](https://flapen.com/research/niches?market=us&signal=high_returns "Return rate > 5%")
According to Flapen's Amazon United States niche tracking, one shoulder bikini is a $20K/yr Amazon United States market (275K searches/yr). The top 5 brands hold 57% of demand. Demand peaks in May–Jun–Jul. Verdict: Worth a look — 55/100.
Data updated Jul 14, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **one shoulder bikini market data**
- **Units sold / yr**
- **750–1K**
- avg 0–100/product
- **Revenue / yr**
- **$22K–$29K**
- units × avg price
- **Conversion rate**
- **0.3%**
- **Avg BSR**
- **#467**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **93%**
- **Out of stock**
- **1.2%**
- **Avg brand age**
- **27 months**
- **Avg seller age**
- **166 days**
## **Competition & brand share**
Clicks spread well past the top 5 (12% combined) — an open shelf where new products get seen.
**Brands**
**36 **▲rising
**Sellers**
**41**
**Top-5 brand share**
**57%**
Top 20: 93%
**Top-5 click share**
**12%**
Top 20: 32%
**Open market**
**38%**
- Holipick22% - Tempt Me11% - Talisea9% - Yonique8% - Herseas7% - CUPSHE6%
## **Demand & seasonality**
Weekly Amazon search volume, last 101 weeks — +64.6% search growth over the last 90 days.
18K13KSpike '25Spike '26Prime Day '26 seasonSepDecMarJunAugNovMarMay
Peak months: May, Jun, Jul · busiest ÷ quietest = 8.1×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/one-shoulder-bikini/trend)
## **Top one shoulder bikini search terms**
- **one shoulder tankini**27K/yr+97.8%0.2% conv. - **one shoulder bikini**30K/yr+58.6%0.1% conv. - **one shoulder swimsuit**30K/yr+55.9%0.1% conv. - **one shoulder bathing suits for women**27K/yr+44.6%0.2% conv. - **one shoulder one piece swimsuit**21K/yr+70.9%0.1% conv. - **one shoulder bikini top**21K/yr+62.9%0.3% conv. - **one shoulder tankini swimsuits for women**18K/yr+52.5%0.2% conv. - **womens one shoulder swimsuit**16K/yr+69.8%0.2% conv. - **one shoulder swim top**15K/yr+68.7%0.2% conv. - **one shoulder bathing suit**16K/yr+85.0%0.2% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/one-shoulder-bikini/search-terms)
## **Top one shoulder bikini 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%$1982%$3963%$5934%$791101001K10K100K 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**Charmo One Piece Swimsuit One Shoulder Bathing Suit for Women Ribbed Swim Suit Scalloped Slimming Elder Swimwear Full Coverage Black L**Charmo**$30.69**4.7★620 rev](https://www.amazon.com/dp/B0DJVTLR6J) [2**Holipick One Shoulder One Piece Swimsuit for Women Tummy Control Bathing Suits Modest Full Coverage Keyhole Swimwear Leopard**Holipick**$33.23**4.6★575 rev](https://www.amazon.com/dp/B0BRN7LSVS) [3**Holipick Black Women One Shoulder High Waisted Bikini Sets Two Piece Swimsuit Tummy Control Bathing Suit Full Coverage Swimwear L**Holipick**$29.23**4.5★566 rev](https://www.amazon.com/dp/B0CT4V3Z1K) [4**Holipick One Shoulder One Piece Swimsuit for Women Tummy Control Bathing Suits Modest Full Coverage Keyhole Swimwear Black**Holipick**$33.10**4.6★1,242 rev](https://www.amazon.com/dp/B0B6992WVV) [5**Herseas High Waisted Bikini Sets 2 Piece Swim Suits for Women One Shoulder Tie Swimsuit Wire Free Crocheted Trim Bathing Suit Blue Beach Vacation Essentails Large**Herseas**$24.89**4.3★556 rev](https://www.amazon.com/dp/B0D14VR9G2)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Zilcremo Women Cutout One Shoulder Bikini Set Mid Rise Bikini Swimsuit Two Piece Bathing Suit Black S**Zilcremo**$18.59**165 rev1y ago](https://www.amazon.com/dp/B0F5GJF555) [**Aidonger One Shoulder One Piece Swimsuit for Women Tummy Control Bathing Suits Color Block Ruched Swim Suit Slimming Swimwear**Aidonger**$35.64**202 rev1y ago](https://www.amazon.com/dp/B0DYJRRL12) [**Tankini Tops for Women Swimwear - One Shoulder Swim Top Only Tummy Control Bathing Suit Top No Bottom 2025 Black Large**Talisea**$24.57**153 rev1y ago](https://www.amazon.com/dp/B0DPHYXSTL) [**Aqua Eve Women Mesh One Piece Swimsuit - Tummy Control One Shoulder Bathing Suit Cut Out Swimwear 2026 Black Large**Aqua Eve**$30.22**418 rev1y ago](https://www.amazon.com/dp/B0DN1PZ4T6) [**Herseas Womens One Shoulder Sporty Bikini Sets High Waisted Tummy Control Swimsuits Trim Ruffle Hem Stretchy Full Lined Bathing Suits Blue Resort Wear Beach Essentials Small**Herseas**$27.56**305 rev1y ago](https://www.amazon.com/dp/B0GWZPMLHY)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Herseas Womens One Shoulder Sporty Bikini Sets High Waisted Tummy Control Swimsuits Trim Ruffle Hem Stretchy Full Lined Bathing Suits Blue Resort Wear Beach Essentials Small**Herseas**$27.56**4.4★**▲ 26%**](https://www.amazon.com/dp/B0GWZPMLHY) [**Holipick One Shoulder One Piece Swimsuit for Women Tummy Control Bathing Suits Modest Full Coverage Keyhole Swimwear**Holipick**$34.77**4.6★**▲ 23%**](https://www.amazon.com/dp/B0BZ7PVMR9) [**Aidonger One Shoulder One Piece Swimsuit for Women Tummy Control Bathing Suits Color Block Ruched Swim Suit Slimming Swimwear**Aidonger**$35.64**4.2★**▲ 21%**](https://www.amazon.com/dp/B0DYJRRL12) [**CUPSHE Womens Bikini Sets Asymmetric Neck Bathing Suit Back Hook M**CUPSHE**$32.93**3.9★**▲ 18%**](https://www.amazon.com/dp/B0D1G8KH93) [**Holipick One Shoulder One Piece Swimsuit for Women Tummy Control Bathing Suits Modest Full Coverage Keyhole Swimwear Black**Holipick**$33.17**4.6★**▲ 17%**](https://www.amazon.com/dp/B0B69RS8XN)
**~~View all trending →~~**
## **What buyers say about one shoulder bikini**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**35%
*“Flattering fit”*
**Shape/Style**11%
*“Very flattering”*
**Comfort-Overall**10%
*“Very comfortable”*
**Quality-Overall**8%
*“It is good quality and very flattering”*
**Color**8%
*“The colors are amazing”*
**Material Quality**5%
*“Good quality material”*
**Value For Money**2%
*“Great value for the money”*
**Strap/String Quality**2%
*“One strap is removable, and I felt secure with and without it”*
**Advertised Vs Actual Product**1%
*“Exactly as pictured”*
**Stretchability/Expandability/Elasticity**1%
*“Its stretches to give just the right comfort”*
### **What buyers complain about **
**Size-Overall**27%
*“Runs HUGE”*
**Chest Fit**4%
*“The top isnt as supportive if you have a larger bust -”*
**Shoulder Fit**3%
*“The off shoulder made me nervous at first”*
**Shape/Style**3%
*“Not flattering at all”*
**Quality-Overall**3%
*“Looks cheap”*
**Material Quality**3%
*“Material feels very cheap”*
**Cushion**3%
*“Needs some padding”*
**Strap/String Quality**2%
*“No support when strap is removed”*
**Comfort-Overall**2%
*“Did not feel good when I put it on”*
**Length**2%
*“Unfortunately just too large/long”*
### **Top return reasons **
**Size-Overall**51%
**Chest Fit**14%
**Length**6%
**Waist Fit**5%
**Shape/Style**5%
**Hip Fit**3%
**Color**2%
**Advertised Vs Actual Product**2%
**Material Quality**2%
**Feet Fit**1%
## **Common questions**
- **Is one shoulder bikini profitable to sell on Amazon United States?**
- The niche generates $20K/yr across 191 tracked products. 11 of 60 products launched in the last 360 days are still selling. 90-day search growth is +64.6%. Flapen's verdict: Worth a look (55/100).
- **How competitive is the one shoulder bikini niche?**
- 36 brands and 41 sellers compete. The top 5 products take 12% of clicks and top 5 brands hold 57% of demand.
- **What do buyers complain about in one shoulder bikini?**
- Top complaints mined from reviews: Size-Overall, Chest Fit, Shoulder Fit. The return rate is 20.8% — above our launch gate.
- **When does demand for one shoulder bikini peak?**
- Demand peaks in May–Jun–Jul; the busiest month runs 8.1× the quietest.
- **What does it cost to enter the one shoulder bikini niche?**
- Listings span $13.50–$39.66; the average listing price is $28.75 (sweet spot $15–$100). The average incumbent carries 959 reviews — the moat a new listing must climb.
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