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80 inch shower curtain liner

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A deep review moat (63,949 avg reviews) — this niche doesn't clear our bar today.

Market size 15Growth 27Conversion 87Competition 34Returns 86Price range 39Avg price 49Brand share 37Review moat 0Quality gap 37

Conversion

Great9.9%

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

Returns

Great1.4%

return rate — above 6% kills the launch gate

Avg price

Okay$11.88

avg listing price — sweet spot $15–$100

Price range

Okay$7.74–$19.61

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

Brand share

Okay83%

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

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Competition

Okay65%

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

Growth

Okay+1.8%

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

Market size

Bad$59K

$59K/yr · 50K searches

Review moat

Bad63,948.72

avg incumbent reviews — the moat a new listing must climb

Competition

The top 5 products take 65% of clicks — established leaders, but buyers still shop beyond them.

Brands

11 falling

Sellers

18

Top-5 brand share

83%

Open market

12%

  • AmazerBath37%
  • Barossa Design22%
  • ZEMAHOME10%
  • ALYVIA SPRING7%
  • LiBa6%
  • Amazer4%
  • Open — no brand owns it (5 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%5%$3K10%$6K15%$9K20%$12K1001K10K100K1.0M Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 18 tracked products in this niche — three views at once, no toggling.

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +1.8% search growth over the last 90 days.
2K1KPrime Day '25Spike '26SepDecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.4×

Reviews

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

What buyers love

Quality-Overall19%

“Excellent Product”

Advertised Vs Actual Product12%

“As Described”

Value For Money10%

“Great value”

Size-Overall7%

“Fit great”

Material Quality5%

“Good material”

Weight Light4%

“Light and easy to hang”

Durability4%

“And durable”

Thickness3%

“Nice thick good looking liner not flimsy material is better than alot of other”

Weight Heavy3%

“Works great, heavy doesn't blow around and stick to you”

Water Resistance3%

“Its fully waterproof”

What buyers complain about

Thickness15%

“Not as thick as I expected”

Quality-Overall9%

“Not happy with the quality”

Weight Heavy8%

“made it quite heavy”

Size-Overall6%

“It's a half inch too short”

Magnetic Strength/Adsorption5%

“The magnetic is not strong at all”

Water Resistance4%

“Is not totally water proof”

Material Quality4%

“Cheap materials”

Advertised Vs Actual Product4%

“Not as advertised”

Smell4%

“it has a very strong smell”

Weight Light3%

“Too Light and Not Enough Magnets/Weights”

Top return reasons

Size-Overall45%
Material Quality9%
Thin9%
Advertised Vs Actual Product7%
Quality-Overall4%
Value For Money4%
Weight Heavy4%
Thickness2%
Magnetic Strength/Adsorption2%
Color2%