period swimwear
Worth a lookShows demand growing +247.7% this quarter, but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Growth
Incredible+247.7%90-day search growth — must beat 0% to launch
Avg price
Incredible$25.38avg listing price — sweet spot $15–$100
Price range
Great$14.12–$44.01cheapest to priciest tracked listing — scored on the share inside $15–$100
Competition
Great27%top-5 click share — an open shelf
Market size
Great$1.0M$1.0M/yr · 2.5M searches
Review moat
Good508.23avg incumbent reviews — the moat a new listing must climb
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Brand share
Okay82%top-5 brand share — brands hold most of the demand
Conversion
Bad1.6%search→purchase rate — share of searches ending in a sale
Returns
Bad9.5%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
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.Peak months: May, Jun, Jul · busiest ÷ quietest = 13.1×
Product shelf
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 62 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Leovqn Period Swimwear Leakproof Bikini Swim Bottoms Menstrual Bathing Suit Swimsuit Briefs Bottoms for Teens Girls Women New Black S
Leovqn$19.464.3★1,877 rev
Beautikini Period Swimwear Menstrual Leakproof Swimsuit Short High Waist Bathing Suit Bottoms for Teen Girl Women Black S
Beautikini$33.204.5★825 rev
OVRUNS Period Swimwear Leakproof Bikini Brief Bottoms Waterproof Menstrual Swim Bottoms for Teens Girls Women Black II XS
OVRUNS$21.884.4★1,501 rev
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$16.144.5★195 rev
OVRUNS Period Swimwear Leakproof Bikini Brief Bottoms Waterproof Menstrual Swim Bottoms for Teens Girls Women Black II S
OVRUNS$22.034.4★1,501 rev
Newest
by launch date
Yorvian Period Swimwear for Teens Women Mid Waisted Swimsuit Bikini Bottom Bathing Suit Menstrual Swim Bottoms Underwear
Yorvian$19.0643 rev
Yorvian Period Swimwear for Teens Women Mid Waisted Swimsuit Bikini Bottom Bathing Suit Menstrual Swim Bottoms Underwear
Yorvian$19.0443 rev
Yorvian Period Swimwear for Teens Women Mid Waisted Swimsuit Bikini Bottom Bathing Suit Menstrual Swim Bottoms Underwear
Yorvian$19.1843 rev
Yorvian Period Swimwear for Teens Women Mid Waisted Swimsuit Bikini Bottom Bathing Suit Menstrual Swim Bottoms Underwear
Yorvian$19.1343 rev
Yorvian Period Swimwear for Teens Women High Waisted Swimsuit Bikini Bottoms Menstrual Swim Bottoms Tankini Bathing Suit Black
Yorvian$18.9737 rev
Trending
90-day click momentumYorvian Period Swimwear for Teens Women Mid Waisted Swimsuit Bikini Bottom Bathing Suit Menstrual Swim Bottoms Underwear
Yorvian$19.134.5★
Yorvian Period Swimwear for Teens Women Mid Waisted Swimsuit Bikini Bottom Bathing Suit Menstrual Swim Bottoms Underwear
Yorvian$19.184.5★
Yorvian Period Swimwear for Teens Women High Waisted Swimsuit Bikini Bottoms Menstrual Swim Bottoms Tankini Bathing Suit Black
Yorvian$18.974.6★
Yorvian Period Swimwear for Teens Women Mid Waisted Swimsuit Bikini Bottom Bathing Suit Menstrual Swim Bottoms Underwear
Yorvian$19.064.5★
Yorvian Period Swimwear for Teens Women Mid Waisted Swimsuit Bikini Bottom Bathing Suit Menstrual Swim Bottoms Underwear
Yorvian$19.044.5★
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“Fit accurate”
“are comfortable”
“seems well made”
“work as advertised”
“gives me confidence while swimming”
“Great quality material”
“good value for price”
“Might even coming back for another color”
“Comfort”
“perfect for summer”
What buyers complain about
“Fit was off”
“does not work”
“They are a little bulkier then normal swin wear”
“It took her a bit of time to get adjusted to the thickness. they're not overly thick”
“this item is supposed to repel water”
“Also the size chart obviously we didn't find accurate”
“others just dont look right with the waistband”
“Swells like a diaper when wet”
“And dirty”
“I dont love the style”
Top return reasons
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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