period underwear for women
Launch itA $2.5M/yr market growing +6.6% this quarter with returns at 3.0% — clears our launch bar.
Market size
Incredible$2.5M$2.5M/yr · 8.2M searches
Avg price
Incredible$22.83avg listing price — sweet spot $15–$100
Competition
Great26%top-5 click share — an open shelf
Price range
Great$9.08–$54.90cheapest to priciest tracked listing — scored on the share inside $15–$100
Quality gap
Great4.3★avg incumbent rating — lower means beatable quality
Brand share
Great60%top-5 brand share — no brand owns this niche
Returns
Okay3.0%return rate — above 6% kills the launch gate
Growth
Okay+6.6%90-day search growth — must beat 0% to launch
Review moat
Bad4,614.46avg incumbent reviews — the moat a new listing must climb
Conversion
Bad1.4%search→purchase rate — share of searches ending in a sale
According to Flapen's Amazon United States niche tracking, period underwear for women is a $2.5M/yr Amazon United States market (8.2M searches/yr). The top 5 brands hold 60% of demand. Verdict: Launch it — 65/100.
Data updated Jul 13, 2026 · scored weekly · How we score niches
Market data
- Units sold / yr
- 125K–150K
- avg 1,500–2,000/product
- Revenue / yr
- $2.9M–$3.4M
- units × avg price
- Launch success
- 55%
- 6 of 11 new (360d)
- Conversion rate
- 1.4%
- Avg BSR
- #117
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 88%
- Out of stock
- 0.0%
- Avg brand age
- 48 months
- Avg seller age
- 140 days
Competition
Clicks spread well past the top 5 (26% combined) — an open shelf where new products get seen.Brands
28 rising
Sellers
54
Top-5 brand share
60%
Top 20: 96%
Top-5 click share
26%
Top 20: 59%
Open market
34%
- Hanes18%
- INNERSY15%
- Bambody11%
- TIICHOO10%
- TANSTC6%
- Neione6%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +6.6% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.4×
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 83 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
TIICHOO Period Underwear for Women Heavy Flow Soft Menstrual Panties Teens Ladies Leakproof Incontinence 5 Pack (1 Black/1 Light Grey/1 Burgundy/1 Rose Gold/1 Turquoise Green Large)
TIICHOO$37.594.4★1,006 rev
INNERSY Period Underwear for Women High Waisted Leak-Proof Postpartum Menstrual Panties 3-Pack (Dark Vintage Large)
INNERSY$22.824.2★10,005 rev
Bambody Absorbent Period Panties - Bamboo Rayon - Period Underwear for Women and Teens - All-Day Long - Overnight Protection- Leakproof - Large - 3 Pack: Black
Bambody$34.084.4★12,173 rev
Bambody Absorbent Period Panties - Bamboo Rayon - Period Underwear for Women and Teens - All-Day Long - Overnight Protection Leakproof - Medium 3 Pack Black
Bambody$35.104.4★12,173 rev
YESWEL Period Underwear For Women Leak-Proof Hipster Brief Heavy Flow 3 Pack (Medium Black)
YESWEL$17.524.4★1,583 rev
Newest
by launch date
TIICHOO Period Underwear for Women Heavy Flow Menstrual Panties Incontinence Leakproof 7 Pack (Medium 7 Bright)
TIICHOO$47.4083 rev
RFOGJV Period Underwear for Women Teens Leak-Proof Menstrual Cotton Protective Hipster Panties 3 Pack Black L
RFOGJV$24.16375 rev
RFOGJV Period Underwear for Women Teens Leak-Proof Menstrual Cotton Protective Hipster Panties 3 Pack Black M
RFOGJV$24.83375 rev
RFOGJV Period Underwear for Women Teens Leak-Proof Menstrual Cotton Protective Hipster Panties 3 Pack Dark Color M
RFOGJV$24.30375 rev
RFOGJV Period Underwear for Women Teens Leak-Proof Menstrual Cotton Protective Hipster Panties 3 Pack Dark Color L
RFOGJV$24.84375 rev
Trending
90-day click momentum
Bambody Absorbent Period Panties - Bamboo Rayon - Period Underwear for Women and Teens - All-Day Long - Overnight Protection- Leakproof - Large - 3 Pack: Pink - Blue - Green
Bambody$36.934.4★
Bambody Absorbent Period Panties - Bamboo Rayon - Period Underwear for Women and Teens - All-Day Long - Overnight Protection - Leakproof - Large - 3 Pack: Black (High Waist)
Bambody$35.154.4★
Mesachy Period Underwear for Women Heavy Flow High Absorbency Panties High Waisted Menstrual Leakproof Postpartum Briefs
Mesachy$11.854.2★
RFOGJV Period Underwear for Women Teens Leak-Proof Menstrual Cotton Protective Hipster Panties 3 Pack Dark Color M
RFOGJV$24.304.4★
RFOGJV Period Underwear for Women Teens Leak-Proof Menstrual Cotton Protective Hipster Panties 3 Pack Black L
RFOGJV$24.164.4★
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“Comfortable for”
“fit like a glove”
“These pants are so good quality”
“are a soft comfortable material”
“Worth every penny”
“very comfortable soft material”
“Good absorption”
“Good amount of stretch”
“Exactly what i need”
“easy to wash”
What buyers complain about
“Didn't fit”
“Not comfortable”
“Low absorbency”
“Smell is weird”
“Other brands are thinner or sports fabric”
“Bad seams”
“not good for what they were made for”
“had very little stretch or give to it at all”
“Very expensive”
“Material rough and uncomfortable”
Top return reasons
Common questions
- Is period underwear for women profitable to sell on Amazon United States?
- The niche generates $2.5M/yr across 83 tracked products. 6 of 11 products launched in the last 360 days are still selling. 90-day search growth is +6.6%. Flapen's verdict: Launch it (65/100).
- How competitive is the period underwear for women niche?
- 28 brands and 54 sellers compete. The top 5 products take 26% of clicks and top 5 brands hold 60% of demand.
- What do buyers complain about in period underwear for women?
- Top complaints mined from reviews: Size-Overall, Comfort-Overall, Absorbency. The return rate is 3.0%.
- When does demand for period underwear for women peak?
- Demand is steady year-round — the busiest month runs 1.4× the quietest.
- What does it cost to enter the period underwear for women niche?
- Listings span $9.08–$54.90; the average listing price is $22.83 (sweet spot $15–$100). The average incumbent carries 4,614 reviews — the moat a new listing must climb.
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