---
title: "Sherlock Holmes Costume — $66K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/sherlock-holmes-costume"
last_updated: "2026-08-10T09:06:10.259Z"
locale: en
meta:
description: "Niche score 36/100 · $66K/yr market · 72K searches/yr · $31.10 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 36/100 · $66K/yr market · 72K searches/yr · $31.10 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Sherlock Holmes Costume — $66K/yr Amazon US Niche (2026) - Flapen"
---
# **sherlock holmes costume**
**Skip it**
Soft demand (-38.2% this quarter) — this niche doesn't clear our bar today.
Market size 16Growth 6Conversion 37Competition 18Returns 16Price range 95Avg price 95Brand share 37Review moat 96Quality gap 72
**Review moat**
**Incredible****73.14**
avg incumbent reviews — the moat a new listing must climb
**Avg price**
**Incredible****$31.10**
avg listing price — sweet spot $15–$100
**Price range**
**Incredible****$16.80–$54.12**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Quality gap**
**Good****4.3★**
avg incumbent rating — lower means beatable quality
**Conversion**
**Okay****2.9%**
search→purchase rate — share of searches ending in a sale
**Brand share**
**Okay****83%**
top-5 brand share — brands hold most of the demand
**Competition**
**Bad****78%**
top-5 click share — a locked-up shelf
**Market size**
**Bad****$66K**
$66K/yr · 72K searches
**Returns**
**Bad****7.6%**
return rate — above 5% kills the launch gate
**Growth**
**Bad****-38.2%**
90-day search growth — must beat 0% to launch
**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, sherlock holmes costume is a $66K/yr Amazon United States market (72K searches/yr). The top 5 brands hold 83% of demand. Demand peaks in Sep–Oct–Nov. Verdict: Skip it — 36/100.
Data updated Jul 17, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **sherlock holmes costume market data**
- **Units sold / yr**
- **2K–2K**
- avg 0–100/product
- **Revenue / yr**
- **$47K–$62K**
- units × avg price
- **Conversion rate**
- **2.9%**
- **Avg BSR**
- **#2,670**
- **Page quality**
- **0%**
- **Prime**
- **86%**
- **Sponsored**
- **71%**
- **Out of stock**
- **9.5%**
- **Avg brand age**
- **50 months**
- **Avg seller age**
- **200 days**
## **Competition & brand share**
The top 5 products capture 78% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**10 **▼falling
**Sellers**
**12**
**Top-5 brand share**
**83%**
Top 20: 100%
**Top-5 click share**
**78%**
Top 20: 100%
**Open market**
**12%**
- Fun Costumes31% - Colorful House30% - fun shack10% - wevgbv8% - GVVJYXD6% - AGCOAH5% - Open — no brand owns it (4 brands, 12%)
## **Demand & seasonality**
Weekly Amazon search volume, last 90 weeks — -38.2% search growth over the last 90 days.
9K7KSpike '25Spike '26 seasonNovDecJanFebMarAprMayJunJulAugSepOctNovDecJanFebMarAprMayJun
Peak months: Sep, Oct, Nov · busiest ÷ quietest = 15.1×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/sherlock-holmes-costume/trend)
## **Top sherlock holmes costume search terms**
- **sherlock holmes costume**61K/yr-36.6%1.7% conv. - **sherlock holmes costume adult**7K/yr-51.9%1.1% conv. - **sherlock holmes coat**4K/yr-38.1%0.7% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/sherlock-holmes-costume/search-terms)
## **Top sherlock holmes 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%$7K20%$13K30%$20K40%$26K1101001K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)3 products missing review or click data not plotted
All 14 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Colorful House Cloak Medieval Detective Cosplay Costume Short Cape for Adult Men and Women Role Play(Khaki 25.59)**Colorful House**$29.53**0.0★0 rev](https://www.amazon.com/dp/B0DQXXJF34) [2**Adults Sherlock Holmes Hat & Poncho Costume Kit Classic Detective Outfit Standard**Fun Costumes**$31.16**4.8★8 rev](https://www.amazon.com/dp/B0D2J8M9J4) [3**wevgbv Detective Costume 11pc Accessories Set Detective Hat Dress up Costume for Adults Men Women Halloween Spy Costumes**wevgbv**$20.94**4.6★59 rev](https://www.amazon.com/dp/B0F5PJX4TJ) [4**fun shack Mens Detective Costume Adult Detective Costume Men Detectives Halloween Costume Private Investigator Costume Medium**fun shack**$53.37**3.8★295 rev](https://www.amazon.com/dp/B004PPXWJC) [5**GVVJYXD Detective Costume Accessories Set Outfit Accessories For Adults Women Men with Detective Hat for Dress Up**GVVJYXD**$16.80**3.0★6 rev](https://www.amazon.com/dp/B0G4QYXH89)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**RUEGGVAT 14 PCS Adult Detective Costume Accessories Set Classic Sleuth Spy Kit with Deerstalker Hat Magnifying Glass Bow Tie Pocket Watch Mustache & Gloves for Halloween Cosplay Mystery Party**RUEGGVAT**$18.92**2 rev3mo ago](https://www.amazon.com/dp/B0GWQDTCDT) [**Univafeli Adults Detective Costume Mens Womens Victorian Outfit Inverness Cape Deerstalker Hat for Halloween Cosplay Button L**Univafeli**$29.18**0 rev3mo ago](https://www.amazon.com/dp/B0GVZZ2B4B) [**Adults Detective Costume Mens Womens Victorian Outfit Inverness Cape Deerstalker Hat for Halloween Cosplay Lace L**Univafeli**$28.76**0 rev3mo ago](https://www.amazon.com/dp/B0GW1FY7N8) [**wevgbv Detective Costume 11pc Accessories Set Detective Hat Dress up Costume for Adults Men Women Halloween Spy Costumes**wevgbv**$20.94**59 rev1y ago](https://www.amazon.com/dp/B0F5PJX4TJ) [**ERDOGLY Detective Costume Accessories Set Detective Outfit Accessories for Adults Men Women with Detective Hat Magnifying Glass Black Bow Tie for Halloween Dress Up Brown**ERDOGLY**$19.56**19 rev1y ago](https://www.amazon.com/dp/B0F24HKHP3)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Adults Detective Costume Mens Womens Victorian Outfit Inverness Cape Deerstalker Hat for Halloween Cosplay Lace L**Univafeli**$28.76**0.0★**▲ 319%**](https://www.amazon.com/dp/B0GW1FY7N8) [**Univafeli Adults Detective Costume Mens Womens Victorian Outfit Inverness Cape Deerstalker Hat for Halloween Cosplay Button L**Univafeli**$29.18**0.0★**▲ 315%**](https://www.amazon.com/dp/B0GVZZ2B4B) [**RUEGGVAT 14 PCS Adult Detective Costume Accessories Set Classic Sleuth Spy Kit with Deerstalker Hat Magnifying Glass Bow Tie Pocket Watch Mustache & Gloves for Halloween Cosplay Mystery Party**RUEGGVAT**$18.92**5.0★**▲ 315%**](https://www.amazon.com/dp/B0GWQDTCDT) [**Colorful House Cloak Medieval Detective Cosplay Costume Short Cape for Adult Men and Women Role Play(Khaki 25.59)**Colorful House**$29.53**0.0★**▲ 283%**](https://www.amazon.com/dp/B0DQXXJF34) [**Adults Sherlock Holmes Hat & Poncho Costume Kit Classic Detective Outfit Standard**Fun Costumes**$31.16**4.8★**▲ 153%**](https://www.amazon.com/dp/B0D2J8M9J4)
**~~View all trending →~~**
## **What buyers say about sherlock holmes costume**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**36%
*“everything else was very good quality for cosplay”*
**Advertised Vs Actual Product**20%
*“Got the job done”*
**Size-Overall**16%
*“fits well”*
**Gifting Purpose**9%
*“Good gag gift”*
**Value For Money**7%
*“Great price”*
**Color**5%
*“The pipe is as expected, great color, realistic,”*
**Weight Heavy**2%
*“heavy not cheap looking”*
### **What buyers complain about **
**Value For Money**50%
*“A bit over priced”*
**Ease Of Use**13%
*“Beard sticker was hard to remove”*
**Sharpness**13%
*“Few issues with sharp edges”*
### **Top return reasons **
**Size-Overall**53%
**Quality-Overall**11%
**Shape/Style**4%
**Material Quality**4%
**Advertised Vs Actual Product**4%
**Length**3%
**Adhesion/Stickiness**3%
**Value For Money**3%
**Stitch/Finish/Polish**2%
**Sleeve Fit**2%
## **Common questions**
- **Is sherlock holmes costume profitable to sell on Amazon United States?**
- The niche generates $66K/yr across 14 tracked products. 0 of 3 products launched in the last 360 days are still selling. 90-day search growth is -38.2%. Flapen's verdict: Skip it (36/100).
- **How competitive is the sherlock holmes costume niche?**
- 10 brands and 12 sellers compete. The top 5 products take 78% of clicks and top 5 brands hold 83% of demand.
- **What do buyers complain about in sherlock holmes costume?**
- Top complaints mined from reviews: Value For Money, Ease Of Use, Sharpness. The return rate is 7.6% — above our launch gate.
- **When does demand for sherlock holmes costume peak?**
- Demand peaks in Sep–Oct–Nov; the busiest month runs 15.1× the quietest.
- **What does it cost to enter the sherlock holmes costume niche?**
- Listings span $16.80–$54.12; the average listing price is $31.10 (sweet spot $15–$100). The average incumbent carries 73 reviews — the moat a new listing must climb.
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