detective costume
Worth a lookShows a sweet-spot price point ($23.79 avg), but high returns (8.4%) keeps it on the watch list.
Avg price
Incredible$23.79avg listing price — sweet spot $15–$100
Brand share
Great41%top-5 brand share — no brand owns this niche
Price range
Great$9.01–$58.04cheapest to priciest tracked listing — scored on the share inside $15–$100
Competition
Great34%top-5 click share — an open shelf
Review moat
Great472.21avg incumbent reviews — the moat a new listing must climb
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Market size
Good$289K$289K/yr · 389K searches
Conversion
Okay3.1%search→purchase rate — share of searches ending in a sale
Growth
Bad-22.6%90-day search growth — must beat 0% to launch
Returns
Bad8.4%return rate — above 5% kills the launch gate
According to Flapen's Amazon United States niche tracking, detective costume is a $289K/yr Amazon United States market (389K searches/yr). The top 5 brands hold 41% of demand. Demand peaks in Oct–Nov. Verdict: Worth a look — 55/100.
Data updated Jul 17, 2026 · scored weekly · How we score niches
detective costume market data
- Units sold / yr
- 10K–13K
- avg 100–250/product
- Revenue / yr
- $238K–$297K
- units × avg price
- Conversion rate
- 3.1%
- Avg BSR
- #5,359
- Page quality
- 0%
- Prime
- 92%
- Sponsored
- 81%
- Out of stock
- 10.2%
- Avg brand age
- 46 months
- Avg seller age
- 191 days
Competition & brand share
Clicks spread well past the top 5 (34% combined) — an open shelf where new products get seen.Brands
41 rising
Sellers
59
Top-5 brand share
41%
Top 20: 82%
Top-5 click share
34%
Top 20: 67%
Open market
54%
- HOVEOX11%
- wevgbv9%
- Colorful House8%
- Fun Costumes7%
- ERDOGLY6%
- GVVJYXD5%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -22.6% search growth over the last 90 days.Peak months: Oct, Nov · busiest ÷ quietest = 8.9×
Top detective costume search terms
- detective costume105K/yr
- detective hat47K/yr
- sherlock holmes costume61K/yr
- sherlock holmes hat34K/yr
- detective costume kids27K/yr
- detective costume women27K/yr
- kids detective costume11K/yr
- detective props6K/yr
- detective accessories8K/yr
- detective outfit5K/yr
Top detective 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.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
wevgbv Detective Costume 11pc Accessories Set Detective Hat Dress up Costume for Adults Men Women Halloween Spy Costumes
wevgbv$20.944.6★59 rev
Colorful House Cloak Medieval Detective Cosplay Costume Short Cape for Adult Men and Women Role Play(Khaki 25.59)
Colorful House$29.530.0★0 rev
HOVEOX Detective Costume Accessories Set Detective Costume Hat Prop Halloween Costumes
HOVEOX$13.904.6★157 rev
Adults Sherlock Holmes Hat & Poncho Costume Kit Classic Detective Outfit Standard
Fun Costumes$31.164.8★8 rev
GVVJYXD Detective Costume Accessories Set Outfit Accessories For Adults Women Men with Detective Hat for Dress Up
GVVJYXD$16.803.0★6 rev
Newest
by launch date
GAKSK Detective Costume Accessories Set 10 PCS Detective Hat Halloween Cosplay Men Women Dress up Prop Adults Spy Outfit
GAKSK$18.597 rev
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$18.922 rev
Adults Detective Costume Mens Womens Victorian Outfit Inverness Cape Deerstalker Hat for Halloween Cosplay Lace S
Univafeli$28.320 rev
Xerteam Detective Costume 20s Detective Costume Adults Hat Suspenders Tie Magnifying Glasses Mustache Detective Cosplay Halloween (style 1)
Xerteam$17.071 rev
ERDOGLY Detective Hat Detective Costume Accessories for Women & Men Cosplay Hat for Halloween Party Dress Up Brown
ERDOGLY$16.5232 rev
Trending
90-day click momentum
UTTPLL Men-Cotton-Gatsby-Newsboy-Driving Caps Soft Classic Irish Hats Golf Beret Flat Hat Cabbie Hunting Cap Halloween Christms Brown
UTTPLL$9.014.5★
GAKSK Detective Costume Accessories Set 10 PCS Detective Hat Halloween Cosplay Men Women Dress up Prop Adults Spy Outfit
GAKSK$18.594.8★
Adults Detective Costume Mens Womens Victorian Outfit Inverness Cape Deerstalker Hat for Halloween Cosplay Lace S
Univafeli$28.320.0★
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$18.925.0★
Colorful House Cloak Medieval Detective Cosplay Costume Short Cape for Adult Men and Women Role Play(Khaki 25.59)
Colorful House$29.530.0★
What buyers say about detective costume
What buyers praise and complain about, mined from review topics.What buyers love
“will fit as described”
“everything else was very good quality for cosplay”
“Worth the money”
“Product as promised”
“Very comfortable”
“Pretty durable”
“They are warm”
“Fun”
“Material was nice and sturdy”
“The pipe is as expected, great color, realistic,”
What buyers complain about
“it was HUGE”
“Poor quality”
“very cheap”
“Fluffy like a slipper and polyester”
“Did not looked right”
“Cheaply made and almost see through”
“maybe rather flimsy”
“light bulb for talc leaks”
“throughout the day I feel the cotton blend stretched”
“For someone with a large head these may be uncomfortable”
Top return reasons
Common questions
- Is detective costume profitable to sell on Amazon United States?
- The niche generates $289K/yr across 63 tracked products. 0 of 7 products launched in the last 360 days are still selling. 90-day search growth is -22.6%. Flapen's verdict: Worth a look (55/100).
- How competitive is the detective costume niche?
- 41 brands and 59 sellers compete. The top 5 products take 34% of clicks and top 5 brands hold 41% of demand.
- What do buyers complain about in detective costume?
- Top complaints mined from reviews: Size-Overall, Quality-Overall, Value For Money. The return rate is 8.4% — above our launch gate.
- When does demand for detective costume peak?
- Demand peaks in Oct–Nov; the busiest month runs 8.9× the quietest.
- What does it cost to enter the detective costume niche?
- Listings span $9.01–$58.04; the average listing price is $23.79 (sweet spot $15–$100). The average incumbent carries 472 reviews — the moat a new listing must climb.