Monster Costume
MaybeProducts sell for $32.44 on average, inside the sweet spot. But an estimated 11.5% of orders come back, 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
An estimated 0.3% of those searches ended in a purchase.
Shoppers searched for this 173K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 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
16 of last year's 37 launches cleared the first-year sales bar.
37 products launched here in the last 12 months. 16 of them cleared the first-year sales bar, our mark for a successful launch. 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
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 21, 2026. The live listing can differ.
Top sellers
by estimated 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
estimated 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 an estimated 34% of clicks, no more. An open shelf where new products get seen.
Brands
26 falling
Sellers
42
Est. top-5 brand share
63%
Top 20: 97%
Est. 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 estimated 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
We read the reviews and the return reasons for every product selling here.
“the legs are about 1 foot too short”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
19 topics
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.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









