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33

pennywise costume kids boys 8-10

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A small market ($0/yr) — this niche doesn't clear our bar today.

Market size 0Growth 65Conversion 0Competition 16Returns 0Price range 94Avg price 95Brand share 26Review moat 83Quality gap 48

Avg price

Incredible$34.73

avg listing price — sweet spot $15–$100

Price range

Great$14.74–$50.83

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

Review moat

Great336.46

avg incumbent reviews — the moat a new listing must climb

Growth

Good+43.7%

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

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Brand share

Okay90%

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

Competition

Bad80%

top-5 click share — a locked-up shelf

Market size

Bad$0

$0/yr · 122K searches

Conversion

Bad0.0%

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

Returns

Bad14.0%

return rate — above 6% kills the launch gate

Competition

The top 5 products capture 80% of clicks — a locked-up shelf that new listings rarely crack.

Brands

9 rising

Sellers

24

Top-5 brand share

90%

Open market

6%

  • Fun World38%
  • Fun Costumes31%
  • Spooktacular Creations9%
  • Morph7%
  • Groydbna5%
  • Sinkawa Jackets4%
  • Open — no brand owns it (3 brands, 6%)

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%$020%$030%$040%$0101001K10K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 13 tracked products in this niche — three views at once, no toggling.

Demand & seasonality

Weekly Amazon search volume, last 103 weeks — +43.7% search growth over the last 90 days.
25K15KSpike '24Spike '25Spike '26SepDecJunAugNovMarMay

Peak months: Sep, Oct, Nov · busiest ÷ quietest = 197.3×

Reviews

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

What buyers love

Size-Overall100%

“And the perfect fit”

What buyers complain about

Quality-Overall50%

“Quality could be much better”

Size-Overall50%

“It runs a little smaller than expected so I would size up to get a perfect fit”

Top return reasons

Size-Overall46%
Advertised Vs Actual Product31%
Material Quality8%
Color8%
Product Condition8%