boo costume
Skip itA small market ($9K/yr) — this niche doesn't clear our bar today.
Avg price
Incredible$23.03avg listing price — sweet spot $15–$100
Price range
Great$4.49–$75.03cheapest to priciest tracked listing — scored on the share inside $15–$100
Brand share
Good67%top-5 brand share — brands hold most of the demand
Competition
Good48%top-5 click share — leaders hold, buyers still browse
Review moat
Good1,114.69avg incumbent reviews — the moat a new listing must climb
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Growth
Okay+4.8%90-day search growth — must beat 0% to launch
Returns
Bad9.2%return rate — above 5% kills the launch gate
Market size
Bad$9K$9K/yr · 234K searches
Conversion
Bad0.2%search→purchase rate — share of searches ending in a sale
According to Flapen's Amazon United States niche tracking, boo costume is a $9K/yr Amazon United States market (234K searches/yr). The top 5 brands hold 67% of demand. Demand peaks in Sep–Oct. Verdict: Skip it — 39/100.
Data updated Jul 10, 2026 · scored weekly · How we score niches
boo costume market data
- Units sold / yr
- 750–1K
- avg 0–100/product
- Revenue / yr
- $17K–$23K
- units × avg price
- Conversion rate
- 0.2%
- Avg BSR
- #1,841
- Page quality
- 0%
- Prime
- 81%
- Sponsored
- 73%
- Out of stock
- 11.2%
- Avg brand age
- 33 months
- Avg seller age
- 179 days
Competition & brand share
The top 5 products take 48% of clicks — established leaders, but buyers still shop beyond them.Brands
17 falling
Sellers
53
Top-5 brand share
67%
Top 20: 100%
Top-5 click share
48%
Top 20: 92%
Open market
27%
- elope24%
- Disney23%
- Fun Costumes7%
- Bubblopus7%
- JenPen6%
- MOBJVIY6%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +4.8% search growth over the last 90 days.Peak months: Sep, Oct · busiest ÷ quietest = 163.3×
Top boo costume search terms
- boo monsters inc costume baby51K/yr
- baby boo costume11K/yr
- boo costume monsters inc baby42K/yr
- monsters inc baby costume15K/yr
- boo costume baby15K/yr
- monsters inc costume baby27K/yr
- monster inc costume baby14K/yr
- baby boo costume monsters inc18K/yr
- monsters inc boo costume baby16K/yr
- baby monsters inc costume12K/yr
Top boo costume 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.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
elope Disney Monsters Inc Boo Velour Baby Carrier Cover Costume Infant Halloween Costume Character Standard
elope$40.244.5★75 rev
Infant Disney and Pixar Monster Boo Halloween Costume | Purple Monster Outfit for Babies | Monsters Inc Infant Costume 9/12mo
Fun Costumes$75.034.9★36 rev
JenPen 4 Pcs Halloween Cartoon Costume Pink T-Shirt and Purple Leggings White Socks Purple Hair Ties Set for Costume(3t-4t)
JenPen$28.654.6★33 rev
MOBJVIY Toddler Baby Cute Animal Outfit Hooded Rompers Funny Toddler Halloween Costume Gifts One-piece Outfit (Blue 6-12 Months)
MOBJVIY$26.154.6★101 rev
Disney Monsters Inc. Boo Infant Baby Girls Cosplay Bodysuit and Hat Set 12 Months
Disney$19.704.8★8,653 rev
Newest
by launch dateBubblopus Baby Halloween Costumes Funny Monster Costume Cute Animal Outfit Halloween Gifts for Infant Toddler Kids (Blue 6-12 Months)
Bubblopus$24.980 rev
Bubblopus Baby Halloween Costumes Funny Monster Costume Cute Animal Outfit Halloween Gifts for Infant Toddler Kids (Blue 18-24 Months)
Bubblopus$24.980 rev
Disney Monsters Inc. Mike Wazowski James P. Sullivan Baby Boys 3 Pack Bodysuit Creeper for Newborn and Infant
Disney$21.765 rev
Disney Monsters Inc. Baby Girls Coverall with Cap 2 Piece Set for Newborn and Infant
Disney$17.9716 rev
Disney Monsters Inc. Baby Girls Coverall with Cap 2 Piece Set for Newborn and Infant
Disney$18.2916 rev
Trending
90-day click momentumBubblopus Baby Halloween Costumes Funny Monster Costume Cute Animal Outfit Halloween Gifts for Infant Toddler Kids (Blue 18-24 Months)
Bubblopus$24.980.0★
Bubblopus Baby Halloween Costumes Funny Monster Costume Cute Animal Outfit Halloween Gifts for Infant Toddler Kids (Blue 6-12 Months)
Bubblopus$24.980.0★
Muineobuka My First Halloween Baby Outfit Newborn Long Sleeve Ribbed Romper with Hat Little Boo Halloween Baby Outfits (Apricot 3-6 Months)
Muineobuka$4.492.0★
Disney Monsters Inc. Mike Wazowski James P. Sullivan Baby Boys 3 Pack Bodysuit Creeper for Newborn and Infant
Disney$21.765.0★
Disney Monsters Inc. Baby Girls Coverall with Cap 2 Piece Set for Newborn and Infant
Disney$18.293.9★
What buyers say about boo costume
What buyers praise and complain about, mined from review topics.What buyers love
“Great quality”
“the onesie fits well”
“Great quality and an excellent gift”
“Super cute and great material”
“Not too bulky”
“very pretty”
“Long zipper looks cute”
“Easy Costume”
“such a great value”
“it still held up perfectly”
What buyers complain about
“Great product and quality i have to return product base it was a little bigger for my baby”
Top return reasons
Common questions
- Is boo costume profitable to sell on Amazon United States?
- The niche generates $9K/yr across 26 tracked products. 0 of 9 products launched in the last 360 days are still selling. 90-day search growth is +4.8%. Flapen's verdict: Skip it (39/100).
- How competitive is the boo costume niche?
- 17 brands and 53 sellers compete. The top 5 products take 48% of clicks and top 5 brands hold 67% of demand.
- What do buyers complain about in boo costume?
- Top complaints mined from reviews: Size-Overall. The return rate is 9.2% — above our launch gate.
- When does demand for boo costume peak?
- Demand peaks in Sep–Oct; the busiest month runs 163.3× the quietest.
- What does it cost to enter the boo costume niche?
- Listings span $4.49–$75.03; the average listing price is $23.03 (sweet spot $15–$100). The average incumbent carries 1,115 reviews — the moat a new listing must climb.