baby monster costume
Skip itA small market ($0/yr) — this niche doesn't clear our bar today.
Avg price
Incredible$23.97avg listing price — sweet spot $15–$100
Price range
Great$14.13–$53.01cheapest to priciest tracked listing — scored on the share inside $15–$100
Review moat
Great420.58avg incumbent reviews — the moat a new listing must climb
Growth
Okay+15.4%90-day search growth — must beat 0% to launch
Brand share
Okay79%top-5 brand share — brands hold most of the demand
Competition
Okay68%top-5 click share — leaders hold, buyers still browse
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Market size
Bad$0$0/yr · 71K searches
Conversion
Bad0.0%search→purchase rate — share of searches ending in a sale
Returns
Bad12.0%return rate — above 5% kills the launch gate
According to Flapen's Amazon United States niche tracking, baby monster costume is a $0/yr Amazon United States market (71K searches/yr). The top 5 brands hold 79% of demand. Demand peaks in Sep–Oct. Verdict: Skip it — 31/100.
Data updated Jul 10, 2026 · scored weekly · How we score niches
baby monster costume market data
- Units sold / yr
- 500–750
- avg 0–100/product
- Revenue / yr
- $12K–$18K
- units × avg price
- Conversion rate
- 0.0%
- Avg BSR
- #1,295
- Page quality
- 0%
- Prime
- 95%
- Sponsored
- 63%
- Out of stock
- 9.5%
- Avg brand age
- 31 months
- Avg seller age
- 195 days
Competition & brand share
The top 5 products take 68% of clicks — established leaders, but buyers still shop beyond them.Brands
11 falling
Sellers
34
Top-5 brand share
79%
Top 20: 100%
Top-5 click share
68%
Top 20: 100%
Open market
16%
- Thorn Tree28%
- Disney18%
- QSTYLE15%
- MUST ROSE SPORTS AND HOMEWEAR9%
- SCOPUCI9%
- FEIBEL5%
- Open — no brand owns it (5 brands, 16%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +15.4% search growth over the last 90 days.Peak months: Sep, Oct · busiest ÷ quietest = 190.4×
Top baby monster costume search terms
- sully costume toddler32K/yr
- sully toddler costume9K/yr
- toddler sully costume11K/yr
- sully monsters inc costume toddler14K/yr
- sulley costume toddler6K/yr
Top baby monster 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 19 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Thorn Tree Toddler Baby Boys Halloween Clothes Set Animal Costumes Outfits 2Pcs Velvet Pants Set (Blue 3-4 Years)
Thorn Tree$25.024.6★49 rev
Unisex Baby Flannel Romper Animal Onesie For Toddler Costume Hooded Cartoon Outfit
QSTYLE$26.124.5★174 rev
MUST ROSE SPORTS AND HOMEWEAR Unisex Baby Flannel Romper Animal Onesie Costume Hooded Cartoon Outfit Suit (horns 90(12-17M)
MUST ROSE SPORTS AND HOMEWEAR$24.674.8★2,515 rev
SCOPUCI Unisex Baby Animal Onesie Pajamas Infant Flannel Halloween Cosplay Costume Toddler Christmas Homewear/Sleepwear
SCOPUCI$23.834.8★382 rev
Disney Monsters Inc Boys Costume Zip Up Hooded Coverall for Newborn Infant and Toddler Blue or Green
Disney$14.134.6★331 rev
Newest
by launch date
Disney Pixar Monsters Inc Dress Up to Play Zip-Up Hooded Coverall for Kids with 3D Horns Sulley (Blue 3T)
Disney$20.1134 rev
Disney Pixar Monsters Inc Dress Up to Play Zip-Up Hooded Coverall for Kids with 3D Horns Mike Wazowski (Green 4T)
Disney$19.7134 rev
Unisex Baby Flannel Romper Animal Onesie For Toddler Costume Hooded Cartoon Outfit
QSTYLE$26.12174 rev
GUEMONG Baby Boy Girl Animal Holloween Cosplay Costume Hooded Romper Jumpsuit Costume Outfit (Blue 4-5 Years)
GUEMONG$28.1928 rev
Thorn Tree Toddler Baby Boys Halloween Clothes Set Animal Costumes Outfits 2Pcs Velvet Pants Set (Blue 3-4 Years)
Thorn Tree$25.0249 rev
Trending
90-day click momentumDisney Pixar Monsters Inc Dress Up to Play Zip-Up Hooded Coverall for Kids with 3D Horns Mike Wazowski (Green 4T)
Disney$19.714.9★
Disney Monsters Inc. Mike Sully Toddler Boys Hooded T-Shirt and French Terry Shorts Outfit Set Sulley Mike 4T
Disney$24.194.7★
Disney Pixar Monsters Inc Dress Up to Play Zip-Up Hooded Coverall for Kids with 3D Horns Sulley (Blue 3T)
Disney$20.114.9★
Disney Monsters Inc. Mike Sully Toddler Boys Hooded T-Shirt and French Terry Shorts Outfit Set Sulley Mike 5T
Disney$24.294.7★
GUEMONG Baby Boy Girl Animal Holloween Cosplay Costume Hooded Romper Jumpsuit Costume Outfit (Blue 4-5 Years)
GUEMONG$28.194.8★
What buyers say about baby monster costume
What buyers praise and complain about, mined from review topics.What buyers love
“fits perfectly”
“kept my daughter warm on Halloween”
“stuffed animal-like material”
“its so well made”
“comfortable”
“decent value”
“Soft”
“Granddaughter really loves playing dress up”
“It came out of the wash looking good”
“thick good material for the cold weather size was spot on”
What buyers complain about
“small”
“But be aware its super hot”
“which isn't as good as 100%”
“The fabric reminds me of a thin sweatshirt”
Top return reasons
Common questions
- Is baby monster costume profitable to sell on Amazon United States?
- The niche generates $0/yr across 19 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is +15.4%. Flapen's verdict: Skip it (31/100).
- How competitive is the baby monster costume niche?
- 11 brands and 34 sellers compete. The top 5 products take 68% of clicks and top 5 brands hold 79% of demand.
- What do buyers complain about in baby monster costume?
- Top complaints mined from reviews: Size-Overall, Warmth, Quality-Overall. The return rate is 12.0% — above our launch gate.
- When does demand for baby monster costume peak?
- Demand peaks in Sep–Oct; the busiest month runs 190.4× the quietest.
- What does it cost to enter the baby monster costume niche?
- Listings span $14.13–$53.01; the average listing price is $23.97 (sweet spot $15–$100). The average incumbent carries 421 reviews — the moat a new listing must climb.