---
title: "Rat Costume — $100K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/rat-costume"
last_updated: "2026-08-10T00:26:30.197Z"
locale: en
meta:
description: "Niche score 45/100 · $100K/yr market · 255K searches/yr · $37.61 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 45/100 · $100K/yr market · 255K searches/yr · $37.61 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Rat Costume — $100K/yr Amazon US Niche (2026) - Flapen"
---
# **rat costume**
**Skip it**
High returns (9.5%) — this niche doesn't clear our bar today.
Market size 25Growth 25Conversion 13Competition 74Returns 9Price range 87Avg price 95Brand share 66Review moat 67Quality gap 48
**Avg price**
**Incredible****$37.61**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$6.31–$97.91**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Competition**
**Good****40%**
top-5 click share — leaders hold, buyers still browse
**Review moat**
**Good****835.7**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Good****65%**
top-5 brand share — brands hold most of the demand
**Quality gap**
**Okay****4.5★**
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**
**Bad****1.0%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Bad****9.5%**
return rate — above 5% kills the launch gate
**Signals**[** No Dominant Brand**](https://flapen.com/research/niches?market=us&signal=no_dominant_brand "Top brand's click share < 20%") [** Low Review Barrier**](https://flapen.com/research/niches?market=us&signal=low_review_barrier "Top brand's reviews < 500") [** High Returns**](https://flapen.com/research/niches?market=us&signal=high_returns "Return rate > 5%")
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 ~~](https://flapen.com/research/methodology)
## **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.
30K20KSpike '24Holiday '24Spike '25Prime Day '25 seasonSepDecMarJunAugNovMarMay
Peak months: Sep, Oct, Nov · busiest ÷ quietest = 13.2×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/rat-costume/trend)
## **Top rat costume search terms**
- **rat costume**168K/yr+3.8%1.0% conv. - **rat costume adult**50K/yr-19.4%0.9% conv. - **rat suit**4K/yr+19.6%0.8% conv. - **adult rat costume**6K/yr-12.0%1.7% conv. - **rat costumes**4K/yr-7.3%0.6% conv. - **rat costume women**11K/yr-8.8%1.1% conv. - **rat halloween costume**6K/yr+74.3%0.0% conv. - **sewer rat costume**3K/yr-22.2%0.6% conv. - **rat king costume**3K/yr-16.0%0.0% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/rat-costume/search-terms)
## **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.
0%3%$3K6%$6K9%$9K12%$12K1101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**HMHMAWAHV Adult Rat Onesie Mouse Halloween Costume Cozy Animal Pajamas One-Piece Cosplay Suit for Women and Men**HMHMAWAHV**$29.99**4.6★46 rev](https://www.amazon.com/dp/B0DTJTCFRX) [2**BWVQNO Adult Mouse Costume Rat onesie Flannel Mouse Halloween Cosplay Costume Women Men**BWVQNO**$34.36**4.7★8 rev](https://www.amazon.com/dp/B0GJHP5JV4) [3**GKTOP Unisex Animal Onesie Pajamas Adult - Flannel Animal One Piece Costume Halloween Cosplay Party Sleepwear (US Alpha Medium Regular Regular Mouse)**GKTOP**$32.67**4.7★11 rev](https://www.amazon.com/dp/B0GF21BQX4) [4**NAMHTOM Rat Costume Adult Women Rat Onesie Animal Pajamas Mouse Halloween Costumes Cartoon Cosplay Sleepwear for Women Men**NAMHTOM**$35.20**4.4★94 rev](https://www.amazon.com/dp/B0D3BNHBRL) [5**NAMHTOM Ugly Rat Onesie Pajamas for Adults - Funny Mouse Costume for Women Men Animal Cosplay Sleepwear Cartoon Rat Jumpsuit for Halloween Christmas Party**NAMHTOM**$29.08**4.7★55 rev](https://www.amazon.com/dp/B0D147PN7X)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**BWVQNO Adult Mouse Costume Rat onesie Flannel Mouse Halloween Cosplay Costume Women Men**BWVQNO**$34.36**8 rev4mo ago](https://www.amazon.com/dp/B0GJHP5JV4) [**BWVQNO Adult Mouse Costume Rat onesie Flannel Mouse Halloween Cosplay Costume Women Men**BWVQNO**$34.36**8 rev4mo ago](https://www.amazon.com/dp/B0GJJ98HM8) [**BWVQNO Adult Mouse Costume Rat onesie Flannel Mouse Halloween Cosplay Costume Women Men**BWVQNO**$34.47**8 rev4mo ago](https://www.amazon.com/dp/B0GJJ748QL) [**GKTOP Unisex Animal Onesie Pajamas Adult - Flannel Animal One Piece Costume Halloween Cosplay Party Sleepwear (US Alpha Medium Regular Regular Mouse)**GKTOP**$32.67**11 rev6mo ago](https://www.amazon.com/dp/B0GF21BQX4) [**California Costumes Mens Giant Rat Size L/XL**California Costumes**$93.08**3 rev11mo ago](https://www.amazon.com/dp/B0FMW4CCLY)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**BWVQNO Adult Mouse Costume Rat onesie Flannel Mouse Halloween Cosplay Costume Women Men**BWVQNO**$34.36**4.7★**▲ 311%**](https://www.amazon.com/dp/B0GJHP5JV4) [**BWVQNO Adult Mouse Costume Rat onesie Flannel Mouse Halloween Cosplay Costume Women Men**BWVQNO**$34.47**4.7★**▲ 292%**](https://www.amazon.com/dp/B0GJJ748QL) [**BWVQNO Adult Mouse Costume Rat onesie Flannel Mouse Halloween Cosplay Costume Women Men**BWVQNO**$34.36**4.7★**▲ 270%**](https://www.amazon.com/dp/B0GJJ98HM8) [**GKTOP Unisex Animal Onesie Pajamas Adult - Flannel Animal One Piece Costume Halloween Cosplay Party Sleepwear (US Alpha Medium Regular Regular Mouse)**GKTOP**$32.67**4.7★**▲ 267%**](https://www.amazon.com/dp/B0GF21BQX4) [**NAMHTOM Mouse Costume Adult Women Rat Onesie Animal Pajamas Mouse Halloween Costumes Cartoon Cosplay Sleepwear for Women Men S**NAMHTOM**$35.19**4.4★**▲ 199%**](https://www.amazon.com/dp/B0DKTF5VKW)
**~~View all trending →~~**
## **What buyers say about rat costume**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**24%
*“Fit is as expected”*
**Quality-Overall**12%
*“Great product”*
**Value For Money**8%
*“Easily one of the best $10ish I've spent”*
**Durability**6%
*“Its durable, and the fan kept it fully inflated the entire time”*
**Warmth**5%
*“Fantastic and cozy choice”*
**Ease Of Use**4%
*“easy to use”*
**Comfort-Overall**3%
*“They are SO comfortable on”*
**Advertised Vs Actual Product**3%
*“The product is accurately displayed in advertisement”*
**Material Quality**3%
*“the material feels soft, warm, and comfortable”*
**Soft Feel**3%
*“Soft, cozy, and fun mouse onesie”*
### **What buyers complain about **
**Size-Overall**32%
*“Runs Large”*
**Quality-Overall**13%
*“Seemed cheap and not well made”*
**Smell**9%
*“I will admit that it does have a chemical plastic smell even after a couple days”*
**Durability**3%
*“Does not appear durable or have an appealing appearance”*
**Strap/String Quality**3%
*“The string is a little big for kids”*
**Portability**2%
*“She said it was a little difficult to move around in”*
**Arm Fit**1%
*“even with my arms fully extended the pocket only reaches just above my knuckles”*
### **Top return reasons **
**Size-Overall**55%
**Length**8%
**Advertised Vs Actual Product**5%
**Quality-Overall**3%
**Value For Money**3%
**Functionality-Overall**3%
**Color**2%
**Defective Material/Parts**2%
**Smell**2%
**Material Quality**2%
## **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.
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