---
title: "Square Neck Swimsuits for Women — $26K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/square-neck-swimsuits-for-women"
last_updated: "2026-08-10T03:27:04.480Z"
locale: en
meta:
description: "Niche score 58/100 · $26K/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 58/100 · $26K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Square Neck Swimsuits for Women — $26K/yr Amazon US Niche (2026) - Flapen"
---
# **square neck swimsuits for women**
**Worth a look**
Shows a fragmented shelf (top 5 take 10% of clicks), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 7Growth 89Conversion 5Competition 98Returns 0Price range 91Avg price 95Brand share 96Review moat 48Quality gap 68
**Competition**
**Incredible****10%**
top-5 click share — an open shelf
**Brand share**
**Incredible****34%**
top-5 brand share — no brand owns this niche
**Avg price**
**Incredible****$29.81**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$11.99–$79.19**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Growth**
**Great****+95.6%**
90-day search growth — must beat 0% to launch
**Quality gap**
**Good****4.3★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Okay****1,659.16**
avg incumbent reviews — the moat a new listing must climb
**Market size**
**Bad****$26K**
$26K/yr · 246K searches
**Conversion**
**Bad****0.4%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Bad****14.6%**
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, square neck swimsuits for women is a $26K/yr Amazon United States market (246K searches/yr). The top 5 brands hold 34% of demand. Demand peaks in May–Jun–Jul. Verdict: Worth a look — 58/100.
Data updated Jul 14, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **square neck swimsuits for women market data**
- **Units sold / yr**
- **750–1K**
- avg 0–100/product
- **Revenue / yr**
- **$22K–$30K**
- units × avg price
- **Conversion rate**
- **0.4%**
- **Avg BSR**
- **#207**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **94%**
- **Out of stock**
- **1.1%**
- **Avg brand age**
- **32 months**
- **Avg seller age**
- **155 days**
## **Competition & brand share**
Clicks spread well past the top 5 (10% combined) — an open shelf where new products get seen.
**Brands**
**79 **▼falling
**Sellers**
**136**
**Top-5 brand share**
**34%**
Top 20: 65%
**Top-5 click share**
**10%**
Top 20: 27%
**Open market**
**65%**
- SUUKSESS8% - baleaf8% - Speedo8% - TyeSmo4% - CUPSHE3% - beautyin3%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +95.6% search growth over the last 90 days.
13K8KSpike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: May, Jun, Jul · busiest ÷ quietest = 6.5×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/square-neck-swimsuits-for-women/trend)
## **Top square neck swimsuits for women search terms**
- **square neck swimsuits for women**28K/yr+109.8%0.1% conv. - **one piece swimsuit teens**25K/yr+127.0%0.2% conv. - **one piece teen swimsuit**15K/yr+175.8%0.4% conv. - **backless swimsuit**18K/yr+96.7%0.0% conv. - **one piece swimsuits for teens**13K/yr+177.8%0.1% conv. - **athletic one piece swimsuit**17K/yr+110.0%0.3% conv. - **one piece swimsuit women low back**18K/yr+70.3%0.1% conv. - **one piece athletic swimsuit women**20K/yr+49.3%0.4% conv. - **athletic one piece swimsuits for women**22K/yr+37.4%0.5% conv. - **swimsuits for teens one piece**14K/yr+70.5%0.1% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/square-neck-swimsuits-for-women/search-terms)
## **Top square neck swimsuits for women 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%$2642%$5293%$7934%$1K101001K10K100K 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**baleaf Womens Athletic Training Adjustable Strap One Piece Swimsuit Swimwear Bathing Suit Black 36**baleaf**$31.20**4.4★7,771 rev](https://www.amazon.com/dp/B0734KDH62) [2**baleaf Womens Athletic Training Adjustable Strap One Piece Swimsuit Swimwear Bathing Suit Black 32**baleaf**$31.56**4.4★7,771 rev](https://www.amazon.com/dp/B0734F6VH5) [3**Jolefille Womens One Piece Swimsuit Tummy Control Modest Bathing Suit Teen Girls Swim Suit Cute Floral Swimwear**Jolefille**$35.00**4.3★226 rev](https://www.amazon.com/dp/B0DLZC271J) [4**Idgreatim Teen Athletic One Piece Swimsuit Size 13 14 Sport Quick Dry Racerback Bathing Suit Black Wide Straps Swimwear with Pads**Idgreatim**$19.50**4.6★69 rev](https://www.amazon.com/dp/B0G493BSGM) [5**Speedo Womens Swimsuit One Piece ProLT Super Pro Solid Adult**Speedo**$22.60**4.1★10,932 rev](https://www.amazon.com/dp/B00FQZPUTK)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**SUUKSESS Women Sexy One Piece Swimsuit Tummy Control Square Neck Bathing Suit Retro Backless Swimwear (Brown White Polka Dots L)**SUUKSESS**$32.66**177 rev6mo ago](https://www.amazon.com/dp/B0GBVYF577) [**Idgreatim Teen Athletic One Piece Swimsuit Size 13 14 Sport Quick Dry Racerback Bathing Suit Black Wide Straps Swimwear with Pads**Idgreatim**$19.50**69 rev7mo ago](https://www.amazon.com/dp/B0G493BSGM) [**YOURUIKEY Girls Swimsuits One Piece Ruched Bathing Suit Halterneck Straps and Removable Bra Swimwear for Teen 13-14Y Blue**YOURUIKEY**$18.83**43 rev8mo ago](https://www.amazon.com/dp/B0FZVYCDH8) [**TyeSmo Girls Swimsuit One Piece Swimsuits for Teen Girls Color Block Strap Teen Swimsuits for Girl 12-14 Drawstring Swimwear Bathing Suit for Teens 12-14 Girl Size 12 Swimsuit with Padded Dark Blue**TyeSmo**$32.56**192 rev10mo ago](https://www.amazon.com/dp/B0FR4TV6XQ) [**SUUKSESS Women Sexy One Piece Tummy Control Swimsuit Scoop Neck Slimming Swimwear 2025 Crisscross Backless Bathing Suit(Brown Medium)**SUUKSESS**$36.00**456 rev1y ago](https://www.amazon.com/dp/B0F6CWRYG5)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Idgreatim Teen Athletic One Piece Swimsuit Size 13 14 Sport Quick Dry Racerback Bathing Suit Black Wide Straps Swimwear with Pads**Idgreatim**$19.50**4.6★**▲ 21%**](https://www.amazon.com/dp/B0G493BSGM) [**SUUKSESS Women Sexy One Piece Swimsuit Tummy Control Square Neck Bathing Suit Retro Backless Swimwear (Brown White Polka Dots L)**SUUKSESS**$32.66**4.3★**▲ 20%**](https://www.amazon.com/dp/B0GBVYF577) [**Speedo Womens Swimsuit One Piece ProLT Super Pro Solid Adult**Speedo**$22.60**4.1★**▲ 19%**](https://www.amazon.com/dp/B00FQZPUTK) [**B2prity Womens One Piece Swimsuit Retro Square Neck Tummy Control Bathing Suits Ruched Modest Full Coverage Swimwear Black White**B2prity**$35.60**4.4★**▲ 11%**](https://www.amazon.com/dp/B0DSC9DNW6) [**Cuddomper Girls Swimsiut Size 13-14 Green Teen One-Piece Bathing Suit with Tropical Print Mesh Cover Ups Adjustable Straps Cut Out Swimwear**Cuddomper**$18.24**4.5★**▲ 11%**](https://www.amazon.com/dp/B0DZP7BH3V)
**~~View all trending →~~**
## **What buyers say about square neck swimsuits for women**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**32%
*“Amazing fit”*
**Comfort-Overall**10%
*“SO COMFORTABLE”*
**Quality-Overall**10%
*“Looks well made”*
**Shape/Style**9%
*“The style is very flattering”*
**Material Quality**6%
*“Good material”*
**Color**4%
*“Color is great”*
**Value For Money**3%
*“Good Value”*
**Design-Overall**2%
*“The design is very elegant”*
**Strap/String Quality**2%
*“The straps are great”*
**Advertised Vs Actual Product**2%
*“Exactly like the picture”*
### **What buyers complain about **
**Size-Overall**30%
*“Too big”*
**Strap/String Quality**5%
*“the strap broke within 10 minutes of use”*
**Chest Fit**4%
*“it was large in the chest area”*
**Quality-Overall**4%
*“Poor quality”*
**Color**3%
*“It turned grey”*
**Stretchability/Expandability/Elasticity**2%
*“Got stretched out”*
**Advertised Vs Actual Product**2%
*“very misleading”*
**Material Quality**2%
*“Cheap material”*
**Durability**2%
*“did not hold up”*
**Shape/Style**2%
*“cut was not flattering”*
### **Top return reasons **
**Size-Overall**61%
**Chest Fit**9%
**Length**8%
**Shape/Style**4%
**Waist Fit**4%
**Hip Fit**3%
**Advertised Vs Actual Product**2%
**Color**1%
**Material Quality**1%
**Strap/String Quality**1%
## **Common questions**
- **Is square neck swimsuits for women profitable to sell on Amazon United States?**
- The niche generates $26K/yr across 261 tracked products. 34 of 109 products launched in the last 360 days are still selling. 90-day search growth is +95.6%. Flapen's verdict: Worth a look (58/100).
- **How competitive is the square neck swimsuits for women niche?**
- 79 brands and 136 sellers compete. The top 5 products take 10% of clicks and top 5 brands hold 34% of demand.
- **What do buyers complain about in square neck swimsuits for women?**
- Top complaints mined from reviews: Size-Overall, Strap/String Quality, Chest Fit. The return rate is 14.6% — above our launch gate.
- **When does demand for square neck swimsuits for women peak?**
- Demand peaks in May–Jun–Jul; the busiest month runs 6.5× the quietest.
- **What does it cost to enter the square neck swimsuits for women niche?**
- Listings span $11.99–$79.19; the average listing price is $29.81 (sweet spot $15–$100). The average incumbent carries 1,659 reviews — the moat a new listing must climb.
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