Is boys halloween costumes size 10-12 profitable to sell on Amazon United States?

The niche generates $30K/yr across 13 tracked products. 0 of 5 products launched in the last 360 days are still selling. 90-day search growth is -15.1%. Flapen's verdict: Skip it (29/100).

How competitive is the boys halloween costumes size 10-12 niche?

12 brands and 15 sellers compete. The top 5 products take 76% of clicks and top 5 brands hold 79% of demand.

What do buyers complain about in boys halloween costumes size 10-12?

Top complaints mined from reviews: Size-Overall, Durability, Quality-Overall. The return rate is 6.5% — above our launch gate.

When does demand for boys halloween costumes size 10-12 peak?

Demand peaks in Sep–Oct–Nov; the busiest month runs 319.3× the quietest.

What does it cost to enter the boys halloween costumes size 10-12 niche?

Listings span $6.54–$36.83; the average listing price is $26.67 (sweet spot $15–$100). The average incumbent carries 1,334 reviews — the moat a new listing must climb.

boys halloween costumes size 10-12

Skip it

Weak search conversion (0.2%) — this niche doesn't clear our bar today.

Avg price

Incredible$26.67

avg listing price — sweet spot $15–$100

Price range

Good$6.54–$36.83

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

Review moat

Good1,333.54

avg incumbent reviews — the moat a new listing must climb

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Brand share

Okay79%

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

Competition

Bad76%

top-5 click share — a locked-up shelf

Returns

Bad6.5%

return rate — above 5% kills the launch gate

Growth

Bad-15.1%

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

Market size

Bad$30K

$30K/yr · 666K searches

Conversion

Bad0.2%

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

Signals Low Review Barrier High Returns

According to Flapen's Amazon United States niche tracking, boys halloween costumes size 10-12 is a $30K/yr Amazon United States market (666K searches/yr). The top 5 brands hold 79% of demand. Demand peaks in Sep–Oct–Nov. Verdict: Skip it — 29/100.

Data updated Jul 10, 2026 · scored weekly · How we score niches

boys halloween costumes size 10-12 market data

Units sold / yr: 4K–5K; avg 0–100/product
Revenue / yr: $107K–$133K; units × avg price
Conversion rate: 0.2%
Avg BSR: #1,480
Page quality: 0%
Prime: 100%
Sponsored: 85%
Out of stock: 14.7%
Avg brand age: 40 months
Avg seller age: 173 days

Competition & brand share

The top 5 products capture 76% of clicks — a locked-up shelf that new listings rarely crack.

Brands

12 rising

Sellers

Top-5 brand share

79%

Top 20: 100%

Top-5 click share

76%

Top 20: 100%

Open market

17%

mcuaeddu35%
inkArts16%
GLEDLOVES13%
Nabobs9%
NewPlush5%
Slendor4%
Open — no brand owns it (6 brands, 17%)

Demand & seasonality

Weekly Amazon search volume, last 88 weeks — -15.1% search growth over the last 90 days.

Peak months: Sep, Oct, Nov · busiest ÷ quietest = 319.3×

Open Trend

Top boys halloween costumes size 10-12 search terms

costumes for kids 10-1222K/yr +16.4%0.1% conv.
costumes for boys 8-1020K/yr -37.2%0.2% conv.
boys halloween costumes size 10-12115K/yr +200.0%0.2% conv.
boy costumes 10-1246K/yr -47.4%0.0% conv.
teen boy halloween costumes119K/yr +18.9%0.0% conv.
boy costumes 8-1016K/yr -32.6%0.0% conv.
costume for kids 10-1213K/yr -50.1%0.0% conv.
kids halloween costumes boys 8-1027K/yr +75.3%0.0% conv.
halloween costumes boys 10-1232K/yr +90.7%0.0% conv.
kids costumes for boys 8-107K/yr -31.1%0.0% conv.

All search terms

Top boys halloween costumes size 10-12 products on Amazon

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

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

Top sellers

by 90-day click share

mcuaeddu Demogorgon Onesie Halloween Costume Costume Warm Long Sleeve Costume (10-12 Years)

mcuaeddu$36.834.6★169 rev

inkArts Shark Blanket Hoodie - Adult Shark Sleeping Bag & Cozy Flannel Hoodie

inkArts$20.134.2★4,873 rev

GLEDLOVES LED Gloves for Kids Teens & Adults - Finger Light Gloves with 5 Colors/6 Modes - Perfect for 9-12 Year Old Boys & Girls - Ideal for Halloween & Christmas Parties

GLEDLOVES$6.544.4★3,170 rev

Nabobs Unisex Animal Onesie Costume Flannel Halloween Cosplay Costume - Homewear Animal Outfit

Nabobs$15.294.7★76 rev

NewPlush Unisex Children Unicorn Pyjamas Halloween Kids Onesie Costume (10-12 Years 01Starry Star 10_years)

NewPlush$22.594.5★2,146 rev

Newest

by launch date

Mistletoe unicorn Kids Flannel demogorgon Onesie Pajamas Black

Mistletoe unicorn$29.7875 rev

3mo ago

mcuaeddu Demogorgon Onesie Halloween Costume Costume Warm Long Sleeve Costume (10-12 Years)

mcuaeddu$36.83169 rev

5mo ago

mcuaeddu Demogorgon Onesie Halloween Costume Costume Warm Long Sleeve Costume (8-10 Years)

mcuaeddu$36.55169 rev

5mo ago

Nabobs Unisex Animal Onesie Costume Flannel Halloween Cosplay Costume - Homewear Animal Outfit

Nabobs$15.2976 rev

9mo ago

Corespe Kids Dragon Costume Set with Tail and Mask Boys Halloween Dragon Cosplay Dress Up Outfits (Blue Medium(8-10 Years))

Corespe$31.60116 rev

11mo ago

What buyers say about boys halloween costumes size 10-12

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

What buyers love

Gifting Purpose15%

“Amazing gift”

Fun/Entertainment Experience14%

“Great fun”

Comfort-Overall8%

“comfortable to wear”

Quality-Overall8%

“Good quality”

Soft Feel7%

“Very soft”

Advertised Vs Actual Product6%

“As described”

Size-Overall5%

“The size I bought fit perfectly”

Value For Money5%

“Great buy”

Color4%

“relatively bright colors”

Ease Of Use4%

“Easy to use”

What buyers complain about

Size-Overall28%

“Too small”

Durability15%

“Broke Immediately”

Quality-Overall15%

“not well made”

Stitch/Finish/Polish4%

“Seams are trash”

Gap/Hole4%

“Arrived with hole”

Material Quality3%

“The material was very cheap”

Strap/String Quality2%

“The onesie also had strings of thread hanging loose that I had to cut”

Value For Money2%

“Paid way more than I thought”

Advertised Vs Actual Product2%

“This was nothing like the picture”

Smell2%

“Battery make it smelly”

Top return reasons

Size-Overall55%

Length13%

Gap/Hole4%

Advertised Vs Actual Product4%

Functionality-Overall3%

Material Quality2%

Sleeve Fit2%

Stitch/Finish/Polish2%

Shoulder Fit1%

Arm Fit1%

Common questions

Is boys halloween costumes size 10-12 profitable to sell on Amazon United States?: The niche generates $30K/yr across 13 tracked products. 0 of 5 products launched in the last 360 days are still selling. 90-day search growth is -15.1%. Flapen's verdict: Skip it (29/100).
How competitive is the boys halloween costumes size 10-12 niche?: 12 brands and 15 sellers compete. The top 5 products take 76% of clicks and top 5 brands hold 79% of demand.
What do buyers complain about in boys halloween costumes size 10-12?: Top complaints mined from reviews: Size-Overall, Durability, Quality-Overall. The return rate is 6.5% — above our launch gate.
When does demand for boys halloween costumes size 10-12 peak?: Demand peaks in Sep–Oct–Nov; the busiest month runs 319.3× the quietest.
What does it cost to enter the boys halloween costumes size 10-12 niche?: Listings span $6.54–$36.83; the average listing price is $26.67 (sweet spot $15–$100). The average incumbent carries 1,334 reviews — the moat a new listing must climb.