---
title: "Rat Onesie — $0/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/rat-onesie"
last_updated: "2026-08-10T00:51:19.325Z"
locale: en
meta:
description: "Niche score 35/100 · $0/yr market · 66K searches/yr · $35.39 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 35/100 · $0/yr market · 66K searches/yr · $35.39 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Rat Onesie — $0/yr Amazon US Niche (2026) - Flapen"
---
# **rat onesie**
**Skip it**
A small market ($0/yr) — this niche doesn't clear our bar today.
Market size 0Growth 22Conversion 0Competition 75Returns 0Price range 95Avg price 95Brand share 44Review moat 44Quality gap 38
**Avg price**
**Incredible****$35.39**
avg listing price — sweet spot $15–$100
**Price range**
**Incredible****$18.18–$91.30**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Competition**
**Great****40%**
top-5 click share — an open shelf
**Brand share**
**Okay****79%**
top-5 brand share — brands hold most of the demand
**Review moat**
**Okay****2,073.89**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Growth**
**Bad****-6.1%**
90-day search growth — must beat 0% to launch
**Market size**
**Bad****$0**
$0/yr · 66K searches
**Conversion**
**Bad****0.0%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Bad****14.9%**
return rate — above 5% kills the launch gate
**Signals**[** 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 onesie is a $0/yr Amazon United States market (66K searches/yr). The top 5 brands hold 79% of demand. Verdict: Skip it — 35/100.
Data updated Jul 21, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **rat onesie market data**
- **Units sold / yr**
- **500–750**
- avg 0–100/product
- **Revenue / yr**
- **$18K–$27K**
- units × avg price
- **Conversion rate**
- **0.0%**
- **Avg BSR**
- **#74,545**
- **Page quality**
- **0%**
- **Prime**
- **94%**
- **Sponsored**
- **75%**
- **Out of stock**
- **15.9%**
- **Avg brand age**
- **36 months**
- **Avg seller age**
- **183 days**
## **Competition & brand share**
Clicks spread well past the top 5 (40% combined) — an open shelf where new products get seen.
**Brands**
**15 **▼falling
**Sellers**
**17**
**Top-5 brand share**
**79%**
Top 20: 100%
**Top-5 click share**
**40%**
Top 20: 83%
**Open market**
**16%**
- NAMHTOM23% - HMHMAWAHV20% - Funziez!19% - BWVQNO11% - GKTOP6% - ABENCA5% - Open — no brand owns it (9 brands, 16%)
## **Demand**
Weekly Amazon search volume, last 37 weeks — -6.1% search growth over the last 90 days.
10K6KSpike '26Nov '25Dec '25Jan '26Mar '26Apr '26May '26
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/rat-onesie/trend)
## **Top rat onesie search terms**
- **rat onesie**26K/yr-1.2%0.4% conv. - **mouse onesie**16K/yr-5.6%0.7% conv. - **rat onesie adult**9K/yr-17.5%0.8% conv. - **mouse onesie adult**8K/yr-7.2%1.2% conv. - **rat onsie**4K/yr-12.6%0.7% conv. - **mouse onsie**3K/yr-15.3%0.0% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/rat-onesie/search-terms)
## **Top rat onesie 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%4%$08%$012%$016%$01101001K10K100K 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**Funziez! Slim Fit Adult Onesie - Animal Halloween Costume - Plush Unisex One Piece Cosplay Suit for Women and Men**Funziez!**$33.67**4.5★14,484 rev](https://www.amazon.com/dp/B07WJY1B99) [2**HMHMAWAHV Adult Rat Onesie Mouse Halloween Costume Cozy Animal Pajamas One-Piece Cosplay Suit for Women and Men**HMHMAWAHV**$32.17**4.6★46 rev](https://www.amazon.com/dp/B0DTJVR8FM) [3**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) [4**HMHMAWAHV Adult White Rat Onesie Mouse Halloween Costume Animal Cosplay One-Piece Pajamas for Women and Men**HMHMAWAHV**$27.40**4.6★46 rev](https://www.amazon.com/dp/B0GHQBMYCH) [5**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)
**~~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**$34.91**8 rev4mo ago](https://www.amazon.com/dp/B0GJJ3RK5M) [**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) [**HMHMAWAHV Adult White Rat Onesie Mouse Halloween Costume Animal Cosplay One-Piece Pajamas for Women and Men**HMHMAWAHV**$27.40**46 rev6mo ago](https://www.amazon.com/dp/B0GHQBMYCH) [**GKTOP Unisex Animal Onesie Pajamas Adult - Flannel Animal One Piece Costume Halloween Cosplay Party Sleepwear (US Alpha Large Regular Regular Mouse)**GKTOP**$34.10**11 rev6mo ago](https://www.amazon.com/dp/B0GF23R76X)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**COSUSKET Snug Fit Unisex Adult Onesie Pajamas Flannel Pig Cosplay Animal One Piece Halloween Costume Sleepwear Homewear**COSUSKET**$29.44**4.6★**▲ 222%**](https://www.amazon.com/dp/B0D769766T) [**HMHMAWAHV Adult White Rat Onesie Mouse Halloween Costume Animal Cosplay One-Piece Pajamas for Women and Men**HMHMAWAHV**$27.40**4.6★**▲ 222%**](https://www.amazon.com/dp/B0GHQBMYCH) [**BWVQNO Adult Mouse Costume Rat onesie Flannel Mouse Halloween Cosplay Costume Women Men**BWVQNO**$34.36**4.7★**▲ 214%**](https://www.amazon.com/dp/B0GJHP5JV4) [**ROC PARTY Novetly Animal Onesie Costume for Unisex Adult - Cozy One Piece Pajamas Sleepwear for Halloween Cosplay & Parties (Mouse Large)**ROC PARTY**$31.69**4.5★**▲ 207%**](https://www.amazon.com/dp/B0FHJPCR1R) [**BWVQNO Adult Mouse Costume Rat onesie Flannel Mouse Halloween Cosplay Costume Women Men**BWVQNO**$34.91**4.7★**▲ 202%**](https://www.amazon.com/dp/B0GJJ3RK5M)
**~~View all trending →~~**
## **What buyers say about rat onesie**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**21%
*“Fit is as expected”*
**Warmth**12%
*“Fantastic and cozy choice”*
**Comfort-Overall**9%
*“It's comfortable”*
**Soft Feel**7%
*“Very cute, soft, and comfy mouse onsie”*
**Material Quality**5%
*“the material feels soft, warm, and comfortable”*
**Value For Money**4%
*“Good value”*
**Ease Of Cleaning**4%
*“It did wash off well”*
**Strength**4%
*“Its super cute and isnt flimsy and cheap feeling as I had thought it would be”*
**Advertised Vs Actual Product**3%
*“The product is accurately displayed in advertisement”*
**Zipper Quality**3%
*“The zipper makes it easy to get on and off, and the pockets are a nice practical touch”*
### **What buyers complain about **
**Size-Overall**19%
*“A little small”*
**Stitch/Finish/Polish**9%
*“seams are fragile”*
**Thickness**6%
*“The fabric is moderately thick and fuzzy”*
**Arm Fit**5%
*“my right arm missed the hole”*
**Product Condition**4%
*“unfortunately a used item was sent”*
### **Top return reasons **
**Size-Overall**56%
**Length**21%
**Product Condition**4%
**Sleeve Fit**4%
**Advertised Vs Actual Product**3%
**Arm Fit**2%
**Thickness**2%
**Waist Fit**2%
**Thigh Fit**1%
**Breathability**1%
## **Common questions**
- **Is rat onesie profitable to sell on Amazon United States?**
- The niche generates $0/yr across 36 tracked products. 0 of 9 products launched in the last 360 days are still selling. 90-day search growth is -6.1%. Flapen's verdict: Skip it (35/100).
- **How competitive is the rat onesie niche?**
- 15 brands and 17 sellers compete. The top 5 products take 40% of clicks and top 5 brands hold 79% of demand.
- **What do buyers complain about in rat onesie?**
- Top complaints mined from reviews: Size-Overall, Stitch/Finish/Polish, Thickness. The return rate is 14.9% — above our launch gate.
- **What does it cost to enter the rat onesie niche?**
- Listings span $18.18–$91.30; the average listing price is $35.39 (sweet spot $15–$100). The average incumbent carries 2,074 reviews — the moat a new listing must climb.
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