Is boys halloween costumes size 8-10 profitable to sell on Amazon United States?

The niche generates $133K/yr across 68 tracked products. 9 of 18 products launched in the last 360 days are still selling. 90-day search growth is -21.6%. Flapen's verdict: Skip it (46/100).

How competitive is the boys halloween costumes size 8-10 niche?

50 brands and 96 sellers compete. The top 5 products take 27% of clicks and top 5 brands hold 36% of demand.

What do buyers complain about in boys halloween costumes size 8-10?

Top complaints mined from reviews: Size-Overall, Quality-Overall, Durability. The return rate is 5.6% — above our launch gate.

When does demand for boys halloween costumes size 8-10 peak?

Demand peaks in Sep–Oct; the busiest month runs 158.1× the quietest.

What does it cost to enter the boys halloween costumes size 8-10 niche?

Listings span $6.54–$126.46; the average listing price is $32.95 (sweet spot $15–$100). The average incumbent carries 1,869 reviews — the moat a new listing must climb.

boys halloween costumes size 8-10

Skip it

Weak search conversion (0.6%) — this niche doesn't clear our bar today.

Brand share

Incredible36%

top-5 brand share — no brand owns this niche

Avg price

Incredible$32.95

avg listing price — sweet spot $15–$100

Competition

Great27%

top-5 click share — an open shelf

Price range

Good$6.54–$126.46

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

Review moat

Okay1,868.85

avg incumbent reviews — the moat a new listing must climb

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Market size

Okay$133K

$133K/yr · 683K searches

Returns

Bad5.6%

return rate — above 5% kills the launch gate

Growth

Bad-21.6%

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

Conversion

Bad0.6%

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

Signals No Dominant Brand Low Review Barrier High Returns

According to Flapen's Amazon United States niche tracking, boys halloween costumes size 8-10 is a $133K/yr Amazon United States market (683K searches/yr). The top 5 brands hold 36% of demand. Demand peaks in Sep–Oct. Verdict: Skip it — 46/100.

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

boys halloween costumes size 8-10 market data

Units sold / yr: 3K–4K; avg 0–100/product
Revenue / yr: $99K–$132K; units × avg price
Conversion rate: 0.6%
Avg BSR: #599
Page quality: 0%
Prime: 97%
Sponsored: 87%
Out of stock: 10.6%
Avg brand age: 40 months
Avg seller age: 165 days

Competition & brand share

Clicks spread well past the top 5 (27% combined) — an open shelf where new products get seen.

Brands

50 flat

Sellers

Top-5 brand share

36%

Top 20: 74%

Top-5 click share

27%

Top 20: 64%

Open market

60%

mcuaeddu9%
Jazwares Costume Play8%
Marvel6%
Elite Sports6%
Spooktacular Creations6%
inkArts4%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -21.6% search growth over the last 90 days.

Peak months: Sep, Oct · busiest ÷ quietest = 158.1×

Open Trend

Top boys halloween costumes size 8-10 search terms

boys costumes 6-862K/yr -13.5%0.8% conv.
boys costumes 10-1286K/yr -47.6%0.3% conv.
kid costumes boys42K/yr -11.8%0.5% conv.
costumes kids20K/yr -11.1%0.2% conv.
costumes for kids boys32K/yr -18.6%0.3% conv.
kids costumes boys29K/yr -33.5%0.8% conv.
costume boys26K/yr -34.6%0.5% conv.
costumes for boys 10-1246K/yr -48.6%0.0% conv.
halloween costumes for boys 10-12100K/yr +79.9%0.0% conv.
halloween costumes for kids boys116K/yr -2.1%0.0% conv.

All search terms

Top boys halloween costumes size 8-10 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 24 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

Spooktacular Creations Halloween Ninja Costume Black Ninja Outfit Set for Kids Halloween Costumes with Accessories for Boys Dress Up and Role Play Party (Small 5-7 yrs)

Spooktacular Creations$28.574.7★10,729 rev

Elite Sports IBJJF Ultra Light BJJ Brazilian Jiu Jitsu Gi for Kids with Preshrunk Fabric and Free Belt (Green 1)

Elite Sports$44.224.8★5,654 rev

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

inkArts$20.134.2★4,873 rev

Marvel Integrated Spider-Man Official Youth Deluxe Zentai Costume - Deluxe Two-Way Stretch Spandex with Invisible Zippers and Wrist Openings for Added Convenience (M)

Jazwares Costume Play$42.564.5★1,853 rev

Newest

by launch date

Spiderman Boys 2-Piece Snug-fit Cotton Holiday Pajama Set Soft & Cute for Kids MILES UNIFORM 6

Marvel$15.323,269 rev

2mo ago

Marvel Unisex Child Kids 2-piece Snug-fit Cotton Pajama Set Spider Costume 6 US

Marvel$13.733,269 rev

2mo ago

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

mcuaeddu$36.83169 rev

5mo ago

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

Nabobs$11.9376 rev

9mo ago

Jeowoqao Costumes for Kids Boys Dress up Clothes for Role Play Boys Muscle Chest Dress up Costumes with Policeman Fireman Costume for Toddler Boy 3 4 5 6 Years Christmas Birthday Gifts

Jeowoqao$28.7987 rev

10mo ago

What buyers say about boys halloween costumes size 8-10

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

What buyers love

Quality-Overall18%

“Amazing quality”

Fun/Entertainment Experience15%

“Fun for kids”

Size-Overall13%

“Fits good”

Value For Money8%

“Good value for the money”

Gifting Purpose7%

“Awesome gift”

Comfort-Overall4%

“is very comfortable”

Material Quality3%

“Material is soft”

Ease Of Use3%

“Easy to use”

Color3%

“Bright colors”

Advertised Vs Actual Product2%

“Works great, just as advertised”

What buyers complain about

Size-Overall19%

“Pretty big”

Quality-Overall18%

“not well made”

Durability11%

“Breaks very easily”

Material Quality4%

“Not my favorite material”

Value For Money3%

“Feels slightly overpriced”

Stitch/Finish/Polish3%

“Stitching is very poor quality”

Strength3%

“Flimsy feeling”

Product Condition2%

“The item came used”

Strap/String Quality2%

“there is a bit of shedding of the strings”

Charging2%

“not able to recharge”

Top return reasons

Size-Overall68%

Length5%

Advertised Vs Actual Product4%

Quality-Overall3%

Material Quality3%

Product Condition2%

Value For Money2%

Defective Material/Parts2%

Functionality-Overall1%

Sleeve Fit1%

Common questions

Is boys halloween costumes size 8-10 profitable to sell on Amazon United States?: The niche generates $133K/yr across 68 tracked products. 9 of 18 products launched in the last 360 days are still selling. 90-day search growth is -21.6%. Flapen's verdict: Skip it (46/100).
How competitive is the boys halloween costumes size 8-10 niche?: 50 brands and 96 sellers compete. The top 5 products take 27% of clicks and top 5 brands hold 36% of demand.
What do buyers complain about in boys halloween costumes size 8-10?: Top complaints mined from reviews: Size-Overall, Quality-Overall, Durability. The return rate is 5.6% — above our launch gate.
When does demand for boys halloween costumes size 8-10 peak?: Demand peaks in Sep–Oct; the busiest month runs 158.1× the quietest.
What does it cost to enter the boys halloween costumes size 8-10 niche?: Listings span $6.54–$126.46; the average listing price is $32.95 (sweet spot $15–$100). The average incumbent carries 1,869 reviews — the moat a new listing must climb.