rat costume
Skip itHigh returns (9.5%) — this niche doesn't clear our bar today.
Avg price
Incredible$37.61avg listing price — sweet spot $15–$100
Price range
Great$6.31–$97.91cheapest to priciest tracked listing — scored on the share inside $15–$100
Competition
Good40%top-5 click share — leaders hold, buyers still browse
Review moat
Good835.7avg incumbent reviews — the moat a new listing must climb
Brand share
Good65%top-5 brand share — brands hold most of the demand
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Market size
Bad$100K$100K/yr · 255K searches
Growth
Bad-0.1%90-day search growth — must beat 0% to launch
Conversion
Bad1.0%search→purchase rate — share of searches ending in a sale
Returns
Bad9.5%return rate — above 5% kills the launch gate
According to Flapen's Amazon United States niche tracking, rat costume is a $100K/yr Amazon United States market (255K searches/yr). The top 5 brands hold 65% of demand. Demand peaks in Sep–Oct–Nov. Verdict: Skip it — 45/100.
Data updated Jul 21, 2026 · scored weekly · How we score niches
rat costume market data
- Units sold / yr
- 3K–4K
- avg 0–100/product
- Revenue / yr
- $113K–$150K
- units × avg price
- Conversion rate
- 1.0%
- Avg BSR
- #19,557
- Page quality
- 0%
- Prime
- 86%
- Sponsored
- 73%
- Out of stock
- 4.5%
- Avg brand age
- 40 months
- Avg seller age
- 193 days
Competition & brand share
The top 5 products take 40% of clicks — established leaders, but buyers still shop beyond them.Brands
21 flat
Sellers
34
Top-5 brand share
65%
Top 20: 100%
Top-5 click share
40%
Top 20: 84%
Open market
29%
- NAMHTOM20%
- BWVQNO15%
- HMHMAWAHV14%
- Fun Costumes9%
- GKTOP8%
- Rubies5%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -0.1% search growth over the last 90 days.Peak months: Sep, Oct, Nov · busiest ÷ quietest = 13.2×
Top rat costume search terms
- rat costume168K/yr
- rat costume adult50K/yr
- rat suit4K/yr
- adult rat costume6K/yr
- rat costumes4K/yr
- rat costume women11K/yr
- rat halloween costume6K/yr
- sewer rat costume3K/yr
- rat king costume3K/yr
Top rat 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
HMHMAWAHV Adult Rat Onesie Mouse Halloween Costume Cozy Animal Pajamas One-Piece Cosplay Suit for Women and Men
HMHMAWAHV$29.994.6★46 rev
BWVQNO Adult Mouse Costume Rat onesie Flannel Mouse Halloween Cosplay Costume Women Men
BWVQNO$34.364.7★8 rev
GKTOP Unisex Animal Onesie Pajamas Adult - Flannel Animal One Piece Costume Halloween Cosplay Party Sleepwear (US Alpha Medium Regular Regular Mouse)
GKTOP$32.674.7★11 rev
NAMHTOM Rat Costume Adult Women Rat Onesie Animal Pajamas Mouse Halloween Costumes Cartoon Cosplay Sleepwear for Women Men
NAMHTOM$35.204.4★94 rev
NAMHTOM Ugly Rat Onesie Pajamas for Adults - Funny Mouse Costume for Women Men Animal Cosplay Sleepwear Cartoon Rat Jumpsuit for Halloween Christmas Party
NAMHTOM$29.084.7★55 rev
Newest
by launch dateBWVQNO Adult Mouse Costume Rat onesie Flannel Mouse Halloween Cosplay Costume Women Men
BWVQNO$34.368 rev
BWVQNO Adult Mouse Costume Rat onesie Flannel Mouse Halloween Cosplay Costume Women Men
BWVQNO$34.368 rev
BWVQNO Adult Mouse Costume Rat onesie Flannel Mouse Halloween Cosplay Costume Women Men
BWVQNO$34.478 rev
GKTOP Unisex Animal Onesie Pajamas Adult - Flannel Animal One Piece Costume Halloween Cosplay Party Sleepwear (US Alpha Medium Regular Regular Mouse)
GKTOP$32.6711 rev
California Costumes Mens Giant Rat Size L/XL
California Costumes$93.083 rev
Trending
90-day click momentumBWVQNO Adult Mouse Costume Rat onesie Flannel Mouse Halloween Cosplay Costume Women Men
BWVQNO$34.364.7★
BWVQNO Adult Mouse Costume Rat onesie Flannel Mouse Halloween Cosplay Costume Women Men
BWVQNO$34.474.7★
BWVQNO Adult Mouse Costume Rat onesie Flannel Mouse Halloween Cosplay Costume Women Men
BWVQNO$34.364.7★
GKTOP Unisex Animal Onesie Pajamas Adult - Flannel Animal One Piece Costume Halloween Cosplay Party Sleepwear (US Alpha Medium Regular Regular Mouse)
GKTOP$32.674.7★
NAMHTOM Mouse Costume Adult Women Rat Onesie Animal Pajamas Mouse Halloween Costumes Cartoon Cosplay Sleepwear for Women Men S
NAMHTOM$35.194.4★
What buyers say about rat costume
What buyers praise and complain about, mined from review topics.What buyers love
“Fit is as expected”
“Great product”
“Easily one of the best $10ish I've spent”
“Its durable, and the fan kept it fully inflated the entire time”
“Fantastic and cozy choice”
“easy to use”
“They are SO comfortable on”
“The product is accurately displayed in advertisement”
“the material feels soft, warm, and comfortable”
“Soft, cozy, and fun mouse onesie”
What buyers complain about
“Runs Large”
“Seemed cheap and not well made”
“I will admit that it does have a chemical plastic smell even after a couple days”
“Does not appear durable or have an appealing appearance”
“The string is a little big for kids”
“She said it was a little difficult to move around in”
“even with my arms fully extended the pocket only reaches just above my knuckles”
Top return reasons
Common questions
- Is rat costume profitable to sell on Amazon United States?
- The niche generates $100K/yr across 37 tracked products. 0 of 10 products launched in the last 360 days are still selling. 90-day search growth is -0.1%. Flapen's verdict: Skip it (45/100).
- How competitive is the rat costume niche?
- 21 brands and 34 sellers compete. The top 5 products take 40% of clicks and top 5 brands hold 65% of demand.
- What do buyers complain about in rat costume?
- Top complaints mined from reviews: Size-Overall, Quality-Overall, Smell. The return rate is 9.5% — above our launch gate.
- When does demand for rat costume peak?
- Demand peaks in Sep–Oct–Nov; the busiest month runs 13.2× the quietest.
- What does it cost to enter the rat costume niche?
- Listings span $6.31–$97.91; the average listing price is $37.61 (sweet spot $15–$100). The average incumbent carries 836 reviews — the moat a new listing must climb.