---
title: "Sans Costume — $0/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/sans-costume"
last_updated: "2026-08-06T02:40:07.545Z"
locale: en
meta:
description: "Niche score 42/100 · $0/yr market · 59K searches/yr · $27.26 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 42/100 · $0/yr market · 59K searches/yr · $27.26 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Sans Costume — $0/yr Amazon US Niche (2026) - Flapen"
---
# **sans costume**
**Skip it**
A small market ($0/yr) — this niche doesn't clear our bar today.
Market size 0Growth 44Conversion 0Competition 46Returns 27Price range 77Avg price 95Brand share 47Review moat 94Quality gap 78
**Avg price**
**Incredible****$27.26**
avg listing price — sweet spot $15–$100
**Review moat**
**Great****119.26**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Great****4.3★**
avg incumbent rating — lower means beatable quality
**Price range**
**Great****$7.24–$42.15**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Brand share**
**Okay****77%**
top-5 brand share — brands hold most of the demand
**Competition**
**Okay****58%**
top-5 click share — leaders hold, buyers still browse
**Growth**
**Okay****+15.2%**
90-day search growth — must beat 0% to launch
**Returns**
**Okay****4.8%**
return rate — above 5% kills the launch gate
**Market size**
**Bad****$0**
$0/yr · 59K searches
**Conversion**
**Bad****0.0%**
search→purchase rate — share of searches ending in a sale
**Signals**[** Low Review Barrier**](https://flapen.com/research/niches?market=us&signal=low_review_barrier "Top brand's reviews < 500")
According to Flapen's Amazon United States niche tracking, sans costume is a $0/yr Amazon United States market (59K searches/yr). The top 5 brands hold 77% of demand. Demand peaks in Sep–Oct. Verdict: Skip it — 42/100.
Data updated Jul 17, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **sans costume market data**
- **Units sold / yr**
- **500–750**
- avg 0–100/product
- **Revenue / yr**
- **$14K–$20K**
- units × avg price
- **Conversion rate**
- **0.0%**
- **Avg BSR**
- **#38,049**
- **Page quality**
- **0%**
- **Prime**
- **83%**
- **Sponsored**
- **61%**
- **Out of stock**
- **24.9%**
- **Avg brand age**
- **55 months**
- **Avg seller age**
- **198 days**
## **Competition & brand share**
The top 5 products take 58% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**13 **▼falling
**Sellers**
**15**
**Top-5 brand share**
**77%**
Top 20: 100%
**Top-5 click share**
**58%**
Top 20: 96%
**Open market**
**19%**
- YJCOS45% - Blulu14% - Emisorn7% - OTPEH6% - Nsoking5% - UPUPCOS4%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +15.2% search growth over the last 90 days.
8K6KSpike '24Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Sep, Oct · busiest ÷ quietest = 33.3×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/sans-costume/trend)
## **Top sans costume search terms**
- **sans costume**31K/yr+13.1%0.3% conv. - **sans cosplay**6K/yr+20.4%0.4% conv. - **undertale costume**12K/yr+12.7%0.0% conv. - **sans undertale costume**6K/yr+14.5%0.6% conv. - **sans costume kids**4K/yr-10.8%0.0% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/sans-costume/search-terms)
## **Top sans 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%10%$020%$030%$040%$01101001K 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 23 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Adult Costume Hoodie Jacket Coat Halloween Sweatshirt Pullover with Mask**YJCOS**$35.69**4.3★51 rev](https://www.amazon.com/dp/B0CJVKFV4L) [2**Blulu 2 Pairs Halloween Skeleton Gloves Stockings Set Skeleton Knee Thigh High Stocks and Full Finger Bones Long Arm Gloves**Blulu**$13.07**4.4★370 rev](https://www.amazon.com/dp/B07VD5HBR8) [3**YJCOS Blue Jacket Hoodie Pullover Halloween Unisex Adult Outwear**YJCOS**$30.33**4.3★32 rev](https://www.amazon.com/dp/B0DJQSDLHR) [4**YJCOS Blue Jacket Hoodie Pullover Halloween Unisex Adult Outwear**YJCOS**$30.35**4.3★32 rev](https://www.amazon.com/dp/B0DJQSVWY7) [5**Nsoking Anime Mens Blue Cosplay Costume Mens Jacket Halloween Outfit Polyester Hoodie Coat (Blue Large)**Nsoking**$39.31**4.5★4 rev](https://www.amazon.com/dp/B0CD2GPZFM)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**ATHX Kids High Stretch Halloween Cosplay Party Bodysuit Costume Child Spandex Back Zipper Headless Zentai Skin Suit Unitard**ATHX**$28.86**15 rev1y ago](https://www.amazon.com/dp/B0FBW3NLXD) [**AwwwCos Cosplay Costume Casual Sweatshirt Blue Coat Sportswear Men Halloween Party Roleplay Outfit M**AwwwCos**$39.99**0 rev1y ago](https://www.amazon.com/dp/B0DQTKG733) [**YJCOS Blue Jacket Hoodie Pullover Halloween Unisex Adult Outwear**YJCOS**$30.33**32 rev1y ago](https://www.amazon.com/dp/B0DJQSDLHR) [**YJCOS Blue Jacket Hoodie Pullover Halloween Unisex Adult Outwear**YJCOS**$30.35**32 rev1y ago](https://www.amazon.com/dp/B0DJQSVWY7) [**YJCOS Blue Jacket Hoodie Pullover Halloween Unisex Adult Outwear**YJCOS**$29.44**32 rev1y ago](https://www.amazon.com/dp/B0DJQQTW3T)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**ATHX Kids High Stretch Halloween Cosplay Party Bodysuit Costume Child Spandex Back Zipper Headless Zentai Skin Suit Unitard**ATHX**$28.86**4.5★**▲ 571%**](https://www.amazon.com/dp/B0FBW3NLXD) [**Men Cosplay Costume Halloween Carnival Costume Outfit Full Set for Girls Women**CIYASHEH**$27.69**3.2★**▲ 500%**](https://www.amazon.com/dp/B0D28SBD5N) [**YJCOS Blue Jacket Hoodie Pullover Halloween Unisex Adult Outwear**YJCOS**$30.35**4.3★**▲ 402%**](https://www.amazon.com/dp/B0DJQSVWY7) [**Adult Costume Hoodie Jacket Coat Halloween Sweatshirt Pullover with Mask**YJCOS**$35.36**4.3★**▲ 396%**](https://www.amazon.com/dp/B0CJVK76J2) [**Emisorn Adult Blue Hoodie Mens Coat Sweatshirt Halloween Outfits Plush Coat**Emisorn**$32.90**4.3★**▲ 309%**](https://www.amazon.com/dp/B0943YF5L7)
**~~View all trending →~~**
## **What buyers say about sans costume**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**29%
*“Great price, good quality”*
**Advertised Vs Actual Product**17%
*“As described, stocking stuffers for granddaughter, she was pleased”*
**Size-Overall**10%
*“They fit well”*
**Comfort-Overall**10%
*“So cute and comfy and I recommend for smaller children maybe 10-16”*
**Value For Money**8%
*“Great price, good quality”*
**Durability**8%
*“super durable and resistant”*
**Brightness/Shine/Glow**6%
*“So shiny so Strong”*
**Thickness**4%
*“absolutely love, quality is thick”*
**Breathability**4%
*“breatheable and the stretch is amazing and, the compatibility is actually really good and its so worth the price”*
**Stretchability/Expandability/Elasticity**4%
*“breatheable and the stretch is amazing and, the compatibility is actually really good and its so worth the price”*
### **What buyers complain about **
**Size-Overall**100%
*“small, way smaller than I thought they'd be”*
### **Top return reasons **
**Size-Overall**82%
**Sleeve Fit**3%
**Brightness/Shine/Glow**3%
**Value For Money**3%
**Durability**3%
**Breathability**3%
**Wrist Fit**2%
## **Common questions**
- **Is sans costume profitable to sell on Amazon United States?**
- The niche generates $0/yr across 23 tracked products. 90-day search growth is +15.2%. Flapen's verdict: Skip it (42/100).
- **How competitive is the sans costume niche?**
- 13 brands and 15 sellers compete. The top 5 products take 58% of clicks and top 5 brands hold 77% of demand.
- **What do buyers complain about in sans costume?**
- Top complaints mined from reviews: Size-Overall. The return rate is 4.8%.
- **When does demand for sans costume peak?**
- Demand peaks in Sep–Oct; the busiest month runs 33.3× the quietest.
- **What does it cost to enter the sans costume niche?**
- Listings span $7.24–$42.15; the average listing price is $27.26 (sweet spot $15–$100). The average incumbent carries 119 reviews — the moat a new listing must climb.
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