---
title: "Sully Monsters Inc Costume Adult — $26K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/sully-monsters-inc-costume-adult"
last_updated: "2026-08-07T20:47:33.966Z"
locale: en
meta:
description: "Niche score 37/100 · $26K/yr market · 746K searches/yr · $29.58 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 37/100 · $26K/yr market · 746K searches/yr · $29.58 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Sully Monsters Inc Costume Adult — $26K/yr Amazon US Niche (2026) - Flapen"
---
# **sully monsters inc costume adult**
**Skip it**
High returns (14.6%) — this niche doesn't clear our bar today.
Market size 7Growth 51Conversion 1Competition 52Returns 0Price range 95Avg price 95Brand share 46Review moat 43Quality gap 43
**Avg price**
**Incredible****$29.58**
avg listing price — sweet spot $15–$100
**Price range**
**Incredible****$19.32–$86.98**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Competition**
**Good****54%**
top-5 click share — leaders hold, buyers still browse
**Growth**
**Good****+21.7%**
90-day search growth — must beat 0% to launch
**Brand share**
**Okay****77%**
top-5 brand share — brands hold most of the demand
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Okay****2,184.32**
avg incumbent reviews — the moat a new listing must climb
**Market size**
**Bad****$26K**
$26K/yr · 746K searches
**Conversion**
**Bad****0.1%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Bad****14.6%**
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, sully monsters inc costume adult is a $26K/yr Amazon United States market (746K searches/yr). The top 5 brands hold 77% of demand. Demand peaks in Sep–Oct–Nov. Verdict: Skip it — 37/100.
Data updated Jul 21, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **sully monsters inc costume adult market data**
- **Units sold / yr**
- **6K–8K**
- avg 100–250/product
- **Revenue / yr**
- **$177K–$237K**
- units × avg price
- **Conversion rate**
- **0.1%**
- **Avg BSR**
- **#20,479**
- **Page quality**
- **0%**
- **Prime**
- **96%**
- **Sponsored**
- **92%**
- **Out of stock**
- **0.9%**
- **Avg brand age**
- **40 months**
- **Avg seller age**
- **196 days**
## **Competition & brand share**
The top 5 products take 54% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**14 **▼falling
**Sellers**
**18**
**Top-5 brand share**
**77%**
Top 20: 100%
**Top-5 click share**
**54%**
Top 20: 93%
**Open market**
**18%**
- COSUSKET39% - NAITOKE16% - Sqlszt10% - Lianshp7% - Disney5% - BGOKTA4%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +21.7% search growth over the last 90 days.
200K150KSpike '24Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Sep, Oct, Nov · busiest ÷ quietest = 100.7×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/sully-monsters-inc-costume-adult/trend)
## **Top sully monsters inc costume adult search terms**
- **sully costume**118K/yr+153.5%0.2% conv. - **sully monsters inc costume**330K/yr-59.0%0.2% conv. - **sully costume adult**30K/yr+297.7%0.3% conv. - **sully onesie adult**50K/yr+17.3%0.5% conv. - **monsters inc onesie**23K/yr-2.9%0.1% conv. - **sully onesie**42K/yr-10.4%0.4% conv. - **mike and sully costume**15K/yr+142.9%0.0% conv. - **monster inc onesie**6K/yr-1.8%0.4% conv. - **adult sully costume**17K/yr+101.0%0.0% conv. - **sully adult costume**9K/yr+42.3%0.0% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/sully-monsters-inc-costume-adult/search-terms)
## **Top sully monsters inc costume adult 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%10%$3K20%$5K30%$8K40%$11K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)1 product missing review or click data not plotted
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**COSUSKET Snug Fit Unisex Adult Onesie Pajamas Flannel Cosplay Animal One Piece Halloween Costume Sleepwear Homewear**COSUSKET**$25.99**4.7★9,011 rev](https://www.amazon.com/dp/B097ZL1LVS) [2**COSUSKET Snug Fit Unisex Adult Onesie Pajamas Flannel Cosplay Animal One Piece Halloween Costume Sleepwear Homewear**COSUSKET**$27.05**4.7★9,011 rev](https://www.amazon.com/dp/B097ZKLSHD) [3**NAITOKE Adult Animal Onesie Halloween Costume Cosplay One-Piece Pajamas Women Man Teens Blue Purple**NAITOKE**$26.28**4.5★1,366 rev](https://www.amazon.com/dp/B0C4P36GT3) [4**Sqlszt Monster Inc Costume Adult Pajamas Halloween Costume Women Men Blue S**Sqlszt**$19.32**4.4★773 rev](https://www.amazon.com/dp/B0C7ZWNPWV) [5**BGOKTA Halloween Animal Onesie Pajamas for Adults Costume Cosplay Homewear One Piece Blue Purple**BGOKTA**$26.32**4.5★3,164 rev](https://www.amazon.com/dp/B0CC4GR5CD)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Disney Pixar Monsters Inc Sulley All-Over Print Adult Cosplay T-Shirt Tee(Teal Medium)**Disney**$24.04**0 rev4mo ago](https://www.amazon.com/dp/B0GT6DX12P) [**Disney Monsters Inc. Sulley Wearable Blanket Hoodie Womens Oversized Hooded Fleece Pullover**Disney**$47.10**38 rev1y ago](https://www.amazon.com/dp/B0DG38XL1C) [**NAITOKE Animal Onesie Adults Halloween Costumes Cosplay Pajamas Blue Purple**NAITOKE**$26.13**3,286 rev1y ago](https://www.amazon.com/dp/B0DBR6LQQB) [**Lianshp Adult Animal and Sea Creature Onesie Pajamas Halloween Cosplay Costume Blue**Lianshp**$26.03**204 rev2y ago](https://www.amazon.com/dp/B0D4YBLL2X) [**Lianshp Adult Animal and Sea Creature Onesie Pajamas Halloween Cosplay Costume Blue**Lianshp**$25.54**204 rev2y ago](https://www.amazon.com/dp/B0D4YPGJYV)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Disney Pixar Monsters Inc Sulley All-Over Print Adult Cosplay T-Shirt Tee(Teal Medium)**Disney**$24.04**0.0★**▲ 675%**](https://www.amazon.com/dp/B0GT6DX12P) [**COSUSKET Snug Fit Unisex Adult Onesie Pajamas Flannel Cosplay Animal One Piece Halloween Costume Sleepwear Homewear Light Green**COSUSKET**$28.29**4.7★**▲ 397%**](https://www.amazon.com/dp/B097ZL5745) [**Lianshp Adult Animal and Sea Creature Onesie Pajamas Halloween Cosplay Costume Blue**Lianshp**$25.54**4.4★**▲ 369%**](https://www.amazon.com/dp/B0D4YPGJYV) [**Disney Monsters Inc. Sulley Wearable Blanket Hoodie Womens Oversized Hooded Fleece Pullover**Disney**$47.10**4.7★**▲ 332%**](https://www.amazon.com/dp/B0DG38XL1C) [**Sqlszt Animal Sulley Monster Onesie Adult Sullivan One Piece Pajamas Unisex Cosplay Costume For Women Men Blue XL**Sqlszt**$26.02**4.4★**▲ 302%**](https://www.amazon.com/dp/B0C812QK39)
**~~View all trending →~~**
## **What buyers say about sully monsters inc costume adult**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**28%
*“Great fit”*
**Comfort-Overall**23%
*“Very comfortable”*
**Quality-Overall**18%
*“Warm and quality costume for Halloween”*
**Warmth**14%
*“It keeps you warm”*
**Advertised Vs Actual Product**3%
*“Exactly as pictured”*
**Value For Money**3%
*“The price was right”*
**Material Quality**3%
*“Fabric is amazing great for cold weather”*
**Pockets/Compartments**2%
*“With pockets”*
**Weather Proof**2%
*“Fabric is amazing great for cold weather”*
**Zipper Quality**2%
*“The zipper worked well”*
### **What buyers complain about **
**Smell**38%
*“had a disturbing smell to the package”*
**Quality-Overall**25%
*“Not the best quality”*
**Size-Overall**13%
*“Ordered a small received a medium”*
**Length**3%
*“The crotch is a bit low”*
### **Top return reasons **
**Size-Overall**60%
**Length**10%
**Thigh Fit**6%
**Advertised Vs Actual Product**3%
**Material Quality**2%
**Arm Fit**2%
**Product Condition**2%
**Thin**2%
**Quality-Overall**2%
**Sleeve Fit**2%
## **Common questions**
- **Is sully monsters inc costume adult profitable to sell on Amazon United States?**
- The niche generates $26K/yr across 25 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is +21.7%. Flapen's verdict: Skip it (37/100).
- **How competitive is the sully monsters inc costume adult niche?**
- 14 brands and 18 sellers compete. The top 5 products take 54% of clicks and top 5 brands hold 77% of demand.
- **What do buyers complain about in sully monsters inc costume adult?**
- Top complaints mined from reviews: Smell, Quality-Overall, Size-Overall. The return rate is 14.6% — above our launch gate.
- **When does demand for sully monsters inc costume adult peak?**
- Demand peaks in Sep–Oct–Nov; the busiest month runs 100.7× the quietest.
- **What does it cost to enter the sully monsters inc costume adult niche?**
- Listings span $19.32–$86.98; the average listing price is $29.58 (sweet spot $15–$100). The average incumbent carries 2,184 reviews — the moat a new listing must climb.
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