---
title: "period swimwear — $1.0M/yr Amazon United States Niche, Score 66/100 - Flapen"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/period-swimwear"
last_updated: "2026-07-20T18:13:23.879Z"
locale: en
meta:
description: "period swimwear shows demand growing +247.7% this quarter, but a failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "period swimwear shows demand growing +247.7% this quarter, but a failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "period swimwear — $1.0M/yr Amazon United States Niche, Score 66/100 - Flapen"
---
# **period swimwear**
**Worth a look**
Shows demand growing +247.7% this quarter, but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 78Growth 99Conversion 20Competition 88Returns 10Price range 93Avg price 95Brand share 39Review moat 75Quality gap 60
**Growth**
**Incredible****+247.7%**
90-day search growth — must beat 0% to launch
**Avg price**
**Incredible****$25.38**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$14.12–$44.01**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Competition**
**Great****27%**
top-5 click share — an open shelf
**Market size**
**Great****$1.0M**
$1.0M/yr · 2.5M searches
**Review moat**
**Good****508.23**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Good****4.4★**
avg incumbent rating — lower means beatable quality
**Brand share**
**Okay****82%**
top-5 brand share — brands hold most of the demand
**Conversion**
**Bad****1.6%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Bad****9.5%**
return rate — above 6% kills the launch gate
According to Flapen's Amazon United States niche tracking, period swimwear is a $1.0M/yr Amazon United States market (2.5M searches/yr). The top 5 brands hold 82% of demand. Demand peaks in May–Jun–Jul. Verdict: Worth a look — 66/100.
Data updated Jul 14, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **Market data**
- **Units sold / yr**
- **40K–50K**
- avg 500–750/product
- **Revenue / yr**
- **$1.0M–$1.3M**
- units × avg price
- **Launch success**
- **73%**
- 8 of 11 new (360d)
- **Conversion rate**
- **1.6%**
- **Avg BSR**
- **#204**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **100%**
- **Out of stock**
- **1.6%**
- **Avg brand age**
- **36 months**
- **Avg seller age**
- **164 days**
## **Competition**
Clicks spread well past the top 5 (27% combined) — an open shelf where new products get seen.
**Brands**
**11 **—flat
**Sellers**
**14**
**Top-5 brand share**
**82%**
Top 20: 100%
**Top-5 click share**
**27%**
Top 20: 65%
**Open market**
**13%**
- Beautikini24% - Leovqn22% - OVRUNS19% - Yorvian12% - Leoparts5% - Jayloa5% - Open — no brand owns it (5 brands, 13%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +247.7% search growth over the last 90 days.
200K150KHoliday '24Spike '25Prime Day '25Black Friday '25Holiday '25Spike '26Prime Day '26 seasonSepDecMarJunAugNovMarMay
Peak months: May, Jun, Jul · busiest ÷ quietest = 13.1×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/period-swimwear/trend)
## **Product shelf**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%3%$31K6%$62K9%$93K12%$124K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 62 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Leovqn Period Swimwear Leakproof Bikini Swim Bottoms Menstrual Bathing Suit Swimsuit Briefs Bottoms for Teens Girls Women New Black S**Leovqn**$19.46**4.3★1,877 rev](https://www.amazon.com/dp/B0BN7XV7D4) [2**Beautikini Period Swimwear Menstrual Leakproof Swimsuit Short High Waist Bathing Suit Bottoms for Teen Girl Women Black S**Beautikini**$33.20**4.5★825 rev](https://www.amazon.com/dp/B0CB3676PT) [3**OVRUNS Period Swimwear Leakproof Bikini Brief Bottoms Waterproof Menstrual Swim Bottoms for Teens Girls Women Black II XS**OVRUNS**$21.88**4.4★1,501 rev](https://www.amazon.com/dp/B0BQXKS62Z) [4**Period Swim Bottoms Leakproof Period Swimwear for Women and Teens Waterproof Bikini Bottoms Menstrual Swimwear Bathing Suit Bottoms Period Underwear for Swimming Quick Dry Comfortable Fit Black**Jayloa**$16.14**4.5★195 rev](https://www.amazon.com/dp/B0D39Z6BZR) [5**OVRUNS Period Swimwear Leakproof Bikini Brief Bottoms Waterproof Menstrual Swim Bottoms for Teens Girls Women Black II S**OVRUNS**$22.03**4.4★1,501 rev](https://www.amazon.com/dp/B0BQXJ1HGR)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Yorvian Period Swimwear for Teens Women Mid Waisted Swimsuit Bikini Bottom Bathing Suit Menstrual Swim Bottoms Underwear**Yorvian**$19.06**43 rev3mo ago](https://www.amazon.com/dp/B0GTQRH9M6) [**Yorvian Period Swimwear for Teens Women Mid Waisted Swimsuit Bikini Bottom Bathing Suit Menstrual Swim Bottoms Underwear**Yorvian**$19.04**43 rev3mo ago](https://www.amazon.com/dp/B0GTR9L7LV) [**Yorvian Period Swimwear for Teens Women Mid Waisted Swimsuit Bikini Bottom Bathing Suit Menstrual Swim Bottoms Underwear**Yorvian**$19.18**43 rev3mo ago](https://www.amazon.com/dp/B0GTQTWB27) [**Yorvian Period Swimwear for Teens Women Mid Waisted Swimsuit Bikini Bottom Bathing Suit Menstrual Swim Bottoms Underwear**Yorvian**$19.13**43 rev3mo ago](https://www.amazon.com/dp/B0GTQWM5N7) [**Yorvian Period Swimwear for Teens Women High Waisted Swimsuit Bikini Bottoms Menstrual Swim Bottoms Tankini Bathing Suit Black**Yorvian**$18.97**37 rev3mo ago](https://www.amazon.com/dp/B0GT8JZPR8)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Yorvian Period Swimwear for Teens Women Mid Waisted Swimsuit Bikini Bottom Bathing Suit Menstrual Swim Bottoms Underwear**Yorvian**$19.13**4.5★**▲ 13%**](https://www.amazon.com/dp/B0GTQWM5N7) [**Yorvian Period Swimwear for Teens Women Mid Waisted Swimsuit Bikini Bottom Bathing Suit Menstrual Swim Bottoms Underwear**Yorvian**$19.18**4.5★**▲ 12%**](https://www.amazon.com/dp/B0GTQTWB27) [**Yorvian Period Swimwear for Teens Women High Waisted Swimsuit Bikini Bottoms Menstrual Swim Bottoms Tankini Bathing Suit Black**Yorvian**$18.97**4.6★**▲ 12%**](https://www.amazon.com/dp/B0GT8JZPR8) [**Yorvian Period Swimwear for Teens Women Mid Waisted Swimsuit Bikini Bottom Bathing Suit Menstrual Swim Bottoms Underwear**Yorvian**$19.06**4.5★**▲ 12%**](https://www.amazon.com/dp/B0GTQRH9M6) [**Yorvian Period Swimwear for Teens Women Mid Waisted Swimsuit Bikini Bottom Bathing Suit Menstrual Swim Bottoms Underwear**Yorvian**$19.04**4.5★**▲ 12%**](https://www.amazon.com/dp/B0GTR9L7LV)
**~~View all trending →~~**
## **Reviews**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**28%
*“Fit accurate”*
**Comfort-Overall**14%
*“are comfortable”*
**Quality-Overall**11%
*“seems well made”*
**Advertised Vs Actual Product**6%
*“work as advertised”*
**Water Resistance**5%
*“gives me confidence while swimming”*
**Material Quality**5%
*“Great quality material”*
**Value For Money**3%
*“good value for price”*
**Color**3%
*“Might even coming back for another color”*
**Ease Of Use**2%
*“Comfort”*
**Suitability Hot Weather**2%
*“perfect for summer”*
### **What buyers complain about **
**Size-Overall**20%
*“Fit was off”*
**Functionality-Overall**17%
*“does not work”*
**Weight Heavy**5%
*“They are a little bulkier then normal swin wear”*
**Thickness**5%
*“It took her a bit of time to get adjusted to the thickness. they're not overly thick”*
**Water Resistance**5%
*“this item is supposed to repel water”*
**Advertised Vs Actual Product**4%
*“Also the size chart obviously we didn't find accurate”*
**Waist Fit**4%
*“others just dont look right with the waistband”*
**Sweat Resistance**2%
*“Swells like a diaper when wet”*
**Ease Of Cleaning**2%
*“And dirty”*
**Shape/Style**2%
*“I dont love the style”*
### **Top return reasons **
**Size-Overall**69%
**Waist Fit**9%
**Hip Fit**5%
**Length**2%
**Advertised Vs Actual Product**2%
**Material Quality**2%
**Shape/Style**1%
**Chest Fit**1%
**Thin**1%
**Comfort-Overall**1%
## **Common questions**
- **Is period swimwear profitable to sell on Amazon United States?**
- The niche generates $1.0M/yr across 62 tracked products. 8 of 11 products launched in the last 360 days are still selling. 90-day search growth is +247.7%. Flapen's verdict: Worth a look (66/100).
- **How competitive is the period swimwear niche?**
- 11 brands and 14 sellers compete. The top 5 products take 27% of clicks and top 5 brands hold 82% of demand.
- **What do buyers complain about in period swimwear?**
- Top complaints mined from reviews: Size-Overall, Functionality-Overall, Weight Heavy. The return rate is 9.5% — above our launch gate.
- **When does demand for period swimwear peak?**
- Demand peaks in May–Jun–Jul; the busiest month runs 13.1× the quietest.
- **What does it cost to enter the period swimwear niche?**
- Listings span $14.12–$44.01; the average listing price is $25.38 (sweet spot $15–$100). The average incumbent carries 508 reviews — the moat a new listing must climb.
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