boys halloween costumes size 10-12
Skip itWeak search conversion (0.2%) — this niche doesn't clear our bar today.
Avg price
Incredible$26.67avg listing price — sweet spot $15–$100
Price range
Good$6.54–$36.83cheapest to priciest tracked listing — scored on the share inside $15–$100
Review moat
Good1,333.54avg 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
Returns
Bad6.5%return rate — above 6% kills the launch gate
Competition
Bad76%top-5 click share — a locked-up shelf
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
Competition
The top 5 products capture 76% of clicks — a locked-up shelf that new listings rarely crack.Brands
12 rising
Sellers
15
Top-5 brand share
79%
Open market
17%
- mcuaeddu35%
- inkArts16%
- GLEDLOVES13%
- Nabobs9%
- NewPlush5%
- Slendor4%
- Open — no brand owns it (6 brands, 17%)
Product shelf
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
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
mcuaeddu Demogorgon Onesie Halloween Costume Costume Warm Long Sleeve Costume (10-12 Years)
mcuaeddu$36.83169 rev
mcuaeddu Demogorgon Onesie Halloween Costume Costume Warm Long Sleeve Costume (8-10 Years)
mcuaeddu$36.55169 rev
Nabobs Unisex Animal Onesie Costume Flannel Halloween Cosplay Costume - Homewear Animal Outfit
Nabobs$15.2976 rev
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
Trending
90-day click momentumMistletoe unicorn Kids Flannel demogorgon Onesie Pajamas Black
Mistletoe unicorn$29.784.5★
Nabobs Unisex Animal Onesie Costume Flannel Halloween Cosplay Costume - Homewear Animal Outfit
Nabobs$15.294.7★
mcuaeddu Demogorgon Onesie Halloween Costume Costume Warm Long Sleeve Costume (8-10 Years)
mcuaeddu$36.554.6★
mcuaeddu Demogorgon Onesie Halloween Costume Costume Warm Long Sleeve Costume (10-12 Years)
mcuaeddu$36.834.6★
NewPlush Unisex Children Unicorn Pyjamas Halloween Kids Onesie Costume (10-12 Years 01Starry Star 10_years)
NewPlush$22.594.5★
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×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“Amazing gift”
“Great fun”
“comfortable to wear”
“Good quality”
“Very soft”
“As described”
“The size I bought fit perfectly”
“Great buy”
“relatively bright colors”
“Easy to use”
What buyers complain about
“Too small”
“Broke Immediately”
“not well made”
“Seams are trash”
“Arrived with hole”
“The material was very cheap”
“The onesie also had strings of thread hanging loose that I had to cut”
“Paid way more than I thought”
“This was nothing like the picture”
“Battery make it smelly”