---
title: "Step Brothers Costume — $49K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/step-brothers-costume"
last_updated: "2026-08-10T03:19:20.084Z"
locale: en
meta:
description: "Niche score 38/100 · $49K/yr market · 143K searches/yr · $29.80 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 38/100 · $49K/yr market · 143K searches/yr · $29.80 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Step Brothers Costume — $49K/yr Amazon US Niche (2026) - Flapen"
---
# **step brothers costume**
**Skip it**
High returns (9.2%) — this niche doesn't clear our bar today.
Market size 12Growth 35Conversion 14Competition 41Returns 10Price range 89Avg price 95Brand share 58Review moat 80Quality gap 30
**Avg price**
**Incredible****$29.80**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$10.76–$68.27**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Great****409.22**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Good****70%**
top-5 brand share — brands hold most of the demand
**Competition**
**Okay****61%**
top-5 click share — leaders hold, buyers still browse
**Growth**
**Okay****+8.1%**
90-day search growth — must beat 0% to launch
**Quality gap**
**Okay****4.6★**
avg incumbent rating — lower means beatable quality
**Conversion**
**Bad****1.2%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Bad****$49K**
$49K/yr · 143K searches
**Returns**
**Bad****9.2%**
return rate — above 5% kills the launch gate
**Signals**[** 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%") [** Out of Stock**](https://flapen.com/research/niches?market=us&signal=out_of_stock "OOS rate > 10%")
According to Flapen's Amazon United States niche tracking, step brothers costume is a $49K/yr Amazon United States market (143K searches/yr). The top 5 brands hold 70% of demand. Demand peaks in Oct–Nov. Verdict: Skip it — 38/100.
Data updated Jul 21, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **step brothers costume market data**
- **Units sold / yr**
- **2K–3K**
- avg 100–250/product
- **Revenue / yr**
- **$60K–$75K**
- units × avg price
- **Conversion rate**
- **1.2%**
- **Avg BSR**
- **#13,566**
- **Page quality**
- **0%**
- **Prime**
- **67%**
- **Sponsored**
- **78%**
- **Out of stock**
- **27.9%**
- **Avg brand age**
- **54 months**
- **Avg seller age**
- **201 days**
## **Competition & brand share**
The top 5 products take 61% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**13 **▲rising
**Sellers**
**13**
**Top-5 brand share**
**70%**
Top 20: 100%
**Top-5 click share**
**61%**
Top 20: 100%
**Open market**
**23%**
- TeeUnion30% - Herothorn15% - Canlierr10% - Spirit Halloween9% - MNCEGEER7% - Cotwinter6%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +8.1% search growth over the last 90 days.
35K25KPrime Day '24Spike '24Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Oct, Nov · busiest ÷ quietest = 128.7×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/step-brothers-costume/trend)
## **Top step brothers costume search terms**
- **step brothers costume**114K/yr+16.1%1.6% conv. - **stepbrothers costume**16K/yr-19.1%0.7% conv. - **step brothers costumes**3K/yr+43.2%0.9% conv. - **step brother costume**3K/yr+45.1%0.0% conv. - **step brothers halloween costume**3K/yr+181.8%0.0% conv. - **step brothers costume for two**4K/yr-69.6%2.2% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/step-brothers-costume/search-terms)
## **Top step brothers 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%$5K20%$10K30%$15K40%$20K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)2 products missing review or click data not plotted
All 18 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**TeeUnion Tuxedo T-Shirt Classic Party Tee Funny Concert Festival Costume Shirt Black**TeeUnion**$15.02**4.6★324 rev](https://www.amazon.com/dp/B0DR6JLRBS) [2**Canlierr 2 Pcs Afro Wig Short Curly Rocker Party Afro Wig 70s 80s Synthetic Fluffy Cosplay Fancy Funny Wigs for Men Women (Black Brown)**Canlierr**$19.15**4.1★58 rev](https://www.amazon.com/dp/B0BFQHSQCZ) [3**Herothorn Mens Thick Argyle Sweater Vests Classic V-Neck Knitwear Sleeveless Pullover Autumn Winter Warm Tank Tops Wine**Herothorn**$27.38**4.6★1,355 rev](https://www.amazon.com/dp/B0BC4K9T7H) [4**Herothorn Mens Thick Argyle Sweater Vests Classic V-Neck Knitwear Sleeveless Pullover Autumn Winter Warm Tank Tops Dark Grey**Herothorn**$25.38**4.6★1,355 rev](https://www.amazon.com/dp/B0BBZHFD96) [5**Cotwinter 2 Pcs Halloween Cosplay Costume Set Afro Fluffy Wigs Pullover Knitwear Vests for Men Women Cosplay Disco Hippie(M)**Cotwinter**$39.04**4.0★21 rev](https://www.amazon.com/dp/B0FC5X6LQM)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**OUHAICUST Step Brothers Costume Brennan Dale Printed Shirt Adult Halloween Couples Outfit Costumes Comedy Movie Cosplay L/XL**OUHAICUST**$27.77**0 rev2mo ago](https://www.amazon.com/dp/B0GZZSXNS1) [**OUHAICUST Step Brothers Costume Brennan Dale Printed Shirt Adult Halloween Couples Outfit Costumes Comedy Movie Cosplay L/XL**OUHAICUST**$29.77**0 rev2mo ago](https://www.amazon.com/dp/B0GZZRH919) [**Cotwinter 2 Pcs Halloween Cosplay Costume Set Afro Fluffy Wigs Pullover Knitwear Vests for Men Women Cosplay Disco Hippie(M)**Cotwinter**$39.04**21 rev11mo ago](https://www.amazon.com/dp/B0FC5X6LQM) [**500 LEVEL Macklin Celebrini Shirt - Macklin Celebrini & Will Smith San Jose Step Brothers WHT (Black Medium)**500 LEVEL**$31.35**2 rev1y ago](https://www.amazon.com/dp/B0F46NCRNR) [**TeeUnion Tuxedo T-Shirt Classic Party Tee Funny Concert Festival Costume Shirt Black**TeeUnion**$15.02**324 rev1y ago](https://www.amazon.com/dp/B0DR6JLRBS)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**500 LEVEL Macklin Celebrini Shirt - Macklin Celebrini & Will Smith San Jose Step Brothers WHT (Black Medium)**500 LEVEL**$31.35**5.0★**▲ 725%**](https://www.amazon.com/dp/B0F46NCRNR) [**OUHAICUST Step Brothers Costume Brennan Dale Printed Shirt Adult Halloween Couples Outfit Costumes Comedy Movie Cosplay L/XL**OUHAICUST**$27.77**0.0★**▲ 720%**](https://www.amazon.com/dp/B0GZZSXNS1) [**OUHAICUST Step Brothers Costume Brennan Dale Printed Shirt Adult Halloween Couples Outfit Costumes Comedy Movie Cosplay L/XL**OUHAICUST**$29.77**0.0★**▲ 716%**](https://www.amazon.com/dp/B0GZZRH919) [**TeeUnion Tuxedo T-Shirt Classic Party Tee Funny Concert Festival Costume Shirt Black**TeeUnion**$15.02**4.6★**▲ 710%**](https://www.amazon.com/dp/B0DR6JLRBS) [**Beer Fest USA Blue and Red Tracksuit Jacket and Pants Halloween Costume Cosplay**Costume Agent**$68.27**4.7★**▲ 685%**](https://www.amazon.com/dp/B0BGQFXZ65)
**~~View all trending →~~**
## **What buyers say about step brothers costume**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**27%
*“Very well made”*
**Size-Overall**24%
*“Fit well”*
**Value For Money**11%
*“good value”*
**Material Quality**11%
*“Great material, all the boys wore it for prom brunch and loved them”*
**Advertised Vs Actual Product**9%
*“Met expectations”*
**Color**5%
*“the colors are beautiful”*
**Soft Feel**3%
*“Soft”*
**Comfort-Overall**3%
*“they were very comfortable”*
**Wig/Artificial Hair Quality**3%
*“Amazing wigs for Halloween costumes”*
**Zipper Quality**3%
*“zipper works well enough for my daughter to use”*
### **What buyers complain about **
**Value For Money**33%
*“at over $30 for the shirt I could not afford any accessories”*
**Material Quality**33%
*“Cheap material and quality”*
**Size-Overall**17%
*“Runs a little small”*
### **Top return reasons **
**Size-Overall**59%
**Chest Fit**8%
**Length**5%
**Advertised Vs Actual Product**3%
**Material Quality**3%
**Waist Fit**3%
**Color**3%
**Value For Money**2%
**Sleeve Fit**2%
**Wig/Artificial Hair Quality**2%
## **Common questions**
- **Is step brothers costume profitable to sell on Amazon United States?**
- The niche generates $49K/yr across 18 tracked products. 0 of 3 products launched in the last 360 days are still selling. 90-day search growth is +8.1%. Flapen's verdict: Skip it (38/100).
- **How competitive is the step brothers costume niche?**
- 13 brands and 13 sellers compete. The top 5 products take 61% of clicks and top 5 brands hold 70% of demand.
- **What do buyers complain about in step brothers costume?**
- Top complaints mined from reviews: Value For Money, Material Quality, Size-Overall. The return rate is 9.2% — above our launch gate.
- **When does demand for step brothers costume peak?**
- Demand peaks in Oct–Nov; the busiest month runs 128.7× the quietest.
- **What does it cost to enter the step brothers costume niche?**
- Listings span $10.76–$68.27; the average listing price is $29.80 (sweet spot $15–$100). The average incumbent carries 409 reviews — the moat a new listing must climb.
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