Monster Costume
MaybeProducts sell for $32.44 on average, inside the sweet spot. But returns run at 11.5% of orders, so Monster Costume is a Maybe.
- Flapen Score
- 50 / 100Top 30% of 16,930 Clothing, Shoes & Jewelry niches · +5 vs the category median of 4550
- Market size
- $15K/yr173K searches / yr
- 90-day growth
- +44.8%search demand this quarter
- Competition
- 34%top-5 click share · 26 brands · 42 sellers
Flapen Score
Monster Costume against its category
The dotted line is the Clothing, Shoes & Jewelry average. Past it, Monster Costume is stronger. Inside it, weaker.
Market
The Monster Costume market on Amazon at a glance
Shoppers on Amazon United States searched for Monster Costume 173K times last year and spent an estimated $15K. The top 5 brands take 63% of clicks. Demand peaks in Sep–Oct. Flapen scores it 50 out of 100, a Maybe.
01 · Demand
0.3% of searches ended in a purchase last week.
Shoppers searched for this 173K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. In the latest week, 0.3% of those searches ended in a purchase. Searches in the last 90 days moved +44.8% against the 90 days before. Searches, conversion and average price together put the market at an estimated $15K a year.
- Searches, last 12 months
- 173K
- Growth, 90 days vs prior 90
- +44.8%
- Conversion, latest week
- 0.3%
- Market size, estimated
- $15Ka year
- Peak month
- October42.9× the quietest month
- Top search term
- monster costume55K searches a year
02 · Price
A sale here is worth $32.44.
Listings sell for $32.44 on average, from $16.30 to $44.98. Amazon reports units sold in ranges. This niche sold 500 to 750 a year. The average listing sells 0 to 100 of them. At $32.44 that is $0 to $3K a year per listing.
- Average price
- $32.44inside the $15 to $100 sweet spot
- Price range
- $16.30–$44.98
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 500–750
- Units per listing a year
- 0–100
- Revenue per listing a year
- $0–$3K
- Returns
- 11.5%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is ads.
91% of listings pay for placement with sponsored ads. 61% ship with Prime. On an average day, 17.0% of listings are out of stock. The average listing ranks #34,420 within Sleep & Lounge. It carries 1,062 reviews at 4.28 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 91%
- Prime listings
- 61%
- Out of stock, average day
- 17.0%
- Average rank
- #34,420in Sleep & Lounge
- Average rating
- 4.28 starsAmazon United States average 4.42 stars
- Average reviews
- 1,062per listing
- Listings tracked
- 56
04 · Newcomers
Amazon counts 16 of last year's 37 launches as successful.
37 products launched here in the last 12 months. Amazon counts 16 of them as successful launches, new products that hit its first-year sales bar. The brands on the shelf have sold for 36 months on average, so the names here are settling in.
- Launched, last 12 months
- 37
- Successful launches
- 16Amazon's first-year sales bar
- Average brand age
- 36 months
Products
Top Monster Costume products & what they sell for
Every tracked product: its share of the shelf, its reviews, and its price.
Top sellers
by 90-day click share
AOLBSPD Big Mouth Monster Onesie Silly Monster Onesie Plush Cosplay Onesie Pajamas Cozy Home Soft Plush Costume(No Shoes Included)-L Purple
- Price
- $35.25
- Rating
- 4.1/5
- Reviews
- 51
- Age
- 4mo ago

AOLBSPD Big Mouth Monster Onesie Silly Monster Onesie Plush Cosplay Onesie Pajamas Cozy Home Soft Plush Costume(No Shoes Included)-XL Green
- Price
- $40.32
- Rating
- 4.1/5
- Reviews
- 51
- Age
- 4mo ago

AOLBSPD Big Mouth Monster Onesie Silly Monster Onesie Plush Cosplay Onesie Pajamas Cozy Home Soft Plush Costume(No Shoes Included)-2XL Green
- Price
- $36.79
- Rating
- 4.1/5
- Reviews
- 51
- Age
- 3mo ago

Brrioe Funny Big Mouth Monster Onesie Pajamas with Large Comb Oversized Plush Fleece Hooded One Piece for Sleep & Party (US Alpha Medium Regular Regular Red)
- Price
- $38.64
- Rating
- 4.2/5
- Reviews
- 41
- Age
- 4mo ago

xfcyzlgl Goofy aldult Onesie Pajamas - Big Mouth Monster Onesie Coral Fleece Couple Loungewear Pajama Party & Cozy Sleepwear Gift (US Alpha X-Large Regular Regular Green)
- Price
- $44.98
- Rating
- 3.8/5
- Reviews
- 40
- Age
- 4mo ago
Trending
90-day click momentum
Brrioe Funny Big Mouth Monster Onesie Pajamas with Large Comb Oversized Plush Fleece Hooded One Piece for Sleep & Party (US Alpha Large Regular Regular Orange)
- Price
- $38.53
- Rating
- 4.2/5
- Reviews
- 41
- Age
- 4mo ago

Brrioe Funny Big Mouth Monster Onesie Pajamas with Large Comb Oversized Plush Fleece Hooded One Piece for Sleep & Party (US Alpha Large Regular Regular Aqua green)
- Price
- $38.90
- Rating
- 4.2/5
- Reviews
- 41
- Age
- 3mo ago

SEHIOZNI Silly Wearable Onesie Kids Funny Green Monster Jumpsuits Goofy Big Mouth Monster Cartoon Ultra-Soft Plush One Piece Silly Wearable Onesie
- Price
- $22.28
- Rating
- 4.2/5
- Reviews
- 18
- Age
- 2mo ago

unicorn paradise Monster Onesie for Animal Pajamas Cosplay Halloween Unisex Costume Without Shoes Blue
- Price
- $42.38
- Rating
- 3.8/5
- Reviews
- 10
- Age
- 3mo ago

JVZJVZ Big mouth monster onesie monster onesie warm home loungewear plush pajamas funny pajamas (US Alpha X-Large Regular Regular Purple)
- Price
- $38.69
- Rating
- 3.7/5
- Reviews
- 17
- Age
- 3mo ago
Newest
by launch date
SEHIOZNI Kids Funny Green Monster Onesie Silly Big Mouth Monster Cartoon Soft Plush One Piece (Purple 2-5 Years)
- Price
- $21.78
- Rating
- 4.2/5
- Reviews
- 18
- Age
- 1mo ago

VLZLQ 2026 Silly Onesie Funny Green Monster Hooded Fleece Onesie Pajamas Snuggle Monster Onesie for Party & Loungewear (US Alpha Large Regular Regular Green)
- Price
- $33.25
- Rating
- 3.9/5
- Reviews
- 4
- Age
- 2mo ago

SEHIOZNI Silly Wearable Onesie Kids Funny Green Monster Jumpsuits Goofy Big Mouth Monster Cartoon Ultra-Soft Plush One Piece Silly Wearable Onesie
- Price
- $22.28
- Rating
- 4.2/5
- Reviews
- 18
- Age
- 2mo ago

unicorn paradise Monster Onesie for Animal Pajamas Cosplay Halloween Unisex Costume Without Shoes Blue
- Price
- $42.38
- Rating
- 3.8/5
- Reviews
- 10
- Age
- 3mo ago

Brrioe Funny Big Mouth Monster Onesie Pajamas with Large Comb Oversized Plush Fleece Hooded One Piece for Sleep & Party (US Alpha Large Regular Regular Aqua green)
- Price
- $38.90
- Rating
- 4.2/5
- Reviews
- 41
- Age
- 3mo ago
Competition
Competition: brands, sellers & click share
The top 5 products take only 34% of clicks. An open shelf where new products get seen.
Brands
26 falling
Sellers
42
Top-5 brand share
63%
Top 20: 97%
Top-5 click share
34%
Top 20: 69%
Open market
30%
- AOLBSPD25%
- Brrioe15%
- Generic8%
- SEHIOZNI8%
- JVZJVZ8%
- COSUSKET7%
Demand
Monster Costume search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: Sep, Oct · busiest ÷ quietest = 42.9×
Search terms
Top Monster Costume search terms shoppers use
The exact words shoppers type, with yearly volume, growth, and conversion.
- monster costume55K/yr
- monster costume kids26K/yr
- monster costume adult19K/yr
- monster costumes10K/yr
- kids monster costume11K/yr
- monster costume women19K/yr
- adult monster costume9K/yr
- kids monster costumes5K/yr
- monster halloween costume7K/yr
- womens monster costume6K/yr
Reviews and returns
What reviews say buyers love and hate about Monster Costume
What buyers praise, what they complain about and why they send it back, from the reviews.
Complain
the legs are about 1 foot too short
short
Its big
Not the best quality
QUALITY CONTROL needs to be involved
Disappointed With Quality for a Halloween Costume
balls up after the first wash
the eye fell off while washing it
Black faded with out washing unfortunately
So awkward in the middle
It was not quite as roomy as I thought it would be
It came used and covered in leaves and pine straw
USED ITEM WAS SENT TO ME
Love
Great fit and match the monster truck
Fits nice
Great fit for my grandson
Very comfortable
Overall, this onesie combines humor, comfort, and quality perfectly
Its perfect for everyday wear, playtime, or even as a cozy layer on cooler days
Good quality
Great quality for the price making it a decent value
10/10 would buy again great quality for the price
I love that I can comfortably wear it over regular clothes if I want extra warmth
Cute and warm
warm, and cozy, making it perfect for relaxing at home or staying comfortable on chilly nights
The material feel really soft
soft and smooth texture
Its soft and warm
Return
11.5% Return rate 66% Fixable by listing
the legs are about 1 foot too short
short
Its big
Not the best quality
QUALITY CONTROL needs to be involved
Disappointed With Quality for a Halloween Costume
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Monster Costume questions
Answered from the same tracked data.









