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girl costumes 4-6

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A small market ($48K/yr) — this niche doesn't clear our bar today.

Market size 12Growth 15Conversion 19Competition 59Returns 56Price range 83Avg price 95Brand share 23Review moat 46Quality gap 25

Avg price

Incredible$25.18

avg listing price — sweet spot $15–$100

Price range

Great$10.55–$39.34

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

Competition

Good50%

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

Returns

Good2.8%

return rate — above 6% kills the launch gate

Review moat

Okay1,856.78

avg incumbent reviews — the moat a new listing must climb

Quality gap

Okay4.6★

avg incumbent rating — lower means beatable quality

Brand share

Bad91%

top-5 brand share — brand-locked demand

Conversion

Bad1.5%

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

Growth

Bad-19.3%

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

Market size

Bad$48K

$48K/yr · 125K searches

Competition

The top 5 products take 50% of clicks — established leaders, but buyers still shop beyond them.

Brands

11 rising

Sellers

56

Top-5 brand share

91%

Open market

7%

  • Disguise35%
  • PJ Masks28%
  • INTIMO21%
  • Maribus-FL4%
  • Spirit Halloween3%
  • Fedio2%
  • Open — no brand owns it (5 brands, 7%)

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%$2K10%$5K15%$7K20%$10K101001K10K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 32 tracked products in this niche — three views at once, no toggling.

Demand & seasonality

Weekly Amazon search volume, last 84 weeks — -19.3% search growth over the last 90 days.
15K10KHoliday '24Spike '25Prime Day '25Spike '26DecJanFebMarAprMayJunJulAugSepOctNovDecJanFebMarAprMayJun

Peak months: Aug, Sep, Oct, Nov · busiest ÷ quietest = 29.3×

Reviews

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

What buyers love

Size-Overall19%

“Sizing was accurate”

Value For Money16%

“Well worth it”

Quality-Overall12%

“These princess costumes are such high quality”

Fun/Entertainment Experience11%

“the kids enjoy it”

Gifting Purpose9%

“Great gift”

Material Quality6%

“durable material that is also really easy to clean”

Ease Of Use5%

“Easy to use”

Color4%

“the colors are so pretty”

Brightness/Shine/Glow3%

“Really does light up”

Advertised Vs Actual Product2%

“The product is accurate to pictures and description”

What buyers complain about

Quality-Overall29%

“Very cheap looking and quality”

Size-Overall16%

“Size issue”

Material Quality10%

“Ugly terrible material”

Durability9%

“Breaks easily”

Advertised Vs Actual Product4%

“Not as advertised”

Stitch/Finish/Polish3%

“a whole section of that came off due to the crappy stitchibg”

Strap/String Quality3%

“Holes,strings hanging,seams coming undone”

Design-Overall2%

“Not well designed especially the tops”

Thickness2%

“Super thin”

Comfort-Overall2%

“Not cozy and comfortable”

Top return reasons

Size-Overall48%
Quality-Overall14%
Advertised Vs Actual Product9%
Material Quality7%
Defective Material/Parts3%
Value For Money2%
Product Condition2%
Stitch/Finish/Polish2%
Gifting Purpose2%
Length1%