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48

period underwear for teens

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Soft demand (-5.8% this quarter) — this niche doesn't clear our bar today.

Market size 69Growth 22Conversion 33Competition 49Returns 40Price range 87Avg price 95Brand share 36Review moat 36Quality gap 48

Avg price

Incredible$22.86

avg listing price — sweet spot $15–$100

Price range

Great$11.01–$53.28

cheapest to priciest tracked listing — scored on the share inside $15–$100

Market size

Good$715K

$715K/yr · 1.2M searches

Competition

Okay56%

top-5 click share — leaders hold, buyers still browse

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Returns

Okay4.2%

return rate — above 6% kills the launch gate

Brand share

Okay84%

top-5 brand share — brands hold most of the demand

Review moat

Okay2,891.38

avg incumbent reviews — the moat a new listing must climb

Conversion

Okay2.6%

search→purchase rate — share of searches ending in a sale

Growth

Bad-5.8%

90-day search growth — must beat 0% to launch

Competition

The top 5 products take 56% of clicks — established leaders, but buyers still shop beyond them.

Brands

12 falling

Sellers

19

Top-5 brand share

84%

Open market

12%

  • Demifill31%
  • Mesachy21%
  • Hanes14%
  • INNERSY9%
  • Nalwort9%
  • TIICHOO4%
  • Open — no brand owns it (6 brands, 12%)

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%10%$72K20%$143K30%$215K40%$286K101001K10K100K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 26 tracked products in this niche — three views at once, no toggling.

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -5.8% search growth over the last 90 days.
35K25KPrime Day '24Spike '24Holiday '24Spike '25Prime Day '25Holiday '25Spike '26SepDecMarJunAugNovMarMay

Peak months: Jan, Aug · busiest ÷ quietest = 1.9×

Reviews

What buyers praise and complain about, mined from review topics.

What buyers love

Comfort-Overall27%

“Super comfortable”

Size-Overall17%

“True to size and description”

Quality-Overall16%

“Super well made”

Soft Feel5%

“Theyre nice and soft”

Washability3%

“wash well too”

Value For Money3%

“Worth it”

Thickness3%

“Nice and thick”

Advertised Vs Actual Product3%

“it does everything advertised”

Color2%

“Cute colors”

Absorbency2%

“Absorbs great and feels amazing”

What buyers complain about

Size-Overall16%

“The fit is awful”

Comfort-Overall12%

“Not comfortable”

Absorbency11%

“NOT ABSORBENT”

Functionality-Overall7%

“Do not work”

Thickness6%

“A little thicker than normal underwear”

Durability4%

“didnt even last 3 hours”

Advertised Vs Actual Product4%

“False advertising”

Material Quality3%

“Poor quality material”

Value For Money3%

“I expected more for the price”

Allergies3%

“cause chafing on my daughter's skin”

Top return reasons

Size-Overall67%
Waist Fit6%
Material Quality4%
Advertised Vs Actual Product3%
Thin3%
Thigh Fit2%
Comfort-Overall2%
Length1%
Absorbency1%
Thickness1%