---
title: "Duo Costumes for Best Friends — Amazon US Product Research"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/duo-costumes-for-best-friends"
last_updated: "2026-08-12T07:07:58.079Z"
locale: en
meta:
description: "Amazon product research for duo costumes for best friends: demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:description": "Amazon product research for duo costumes for best friends: demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:title": "Duo Costumes for Best Friends — Amazon US Product Research"
---
# **Duo Costumes for Best Friends**
**Skip it**
Weak search conversion (0.1%) — this niche doesn't clear our bar today.
Market size 3Growth 42Conversion 1Competition 73Returns 10Price range 89Avg price 95Brand share 88Review moat 79Quality gap 57
**Avg price**
**Incredible****$32.06**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$8.76–$96.96**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Brand share**
**Great****47%**
top-5 brand share — no brand owns this niche
**Review moat**
**Great****419.27**
avg incumbent reviews — the moat a new listing must climb
**Competition**
**Good****41%**
top-5 click share — leaders hold, buyers still browse
**Quality gap**
**Good****4.4★**
avg incumbent rating — lower means beatable quality
**Growth**
**Okay****+13.2%**
90-day search growth — must beat 0% to launch
**Returns**
**Bad****9.3%**
return rate — above 5% kills the launch gate
**Market size**
**Bad****$12K**
$12K/yr · 547K searches
**Conversion**
**Bad****0.1%**
search→purchase rate — share of searches ending in a sale
**Signals**[** No Dominant Brand**](https://flapen.com/research/niches?market=us&signal=no_dominant_brand "Top brand's click share < 20%") [** 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%")
## **Is duo costumes for best friends profitable on Amazon?**
According to Flapen's Amazon United States niche tracking, duo costumes for best friends is a $12K/yr Amazon United States market (547K searches/yr). The top 5 brands hold 47% of demand. Demand peaks in Sep–Oct–Nov. Verdict: Skip it — 46/100.
Data updated Jul 10, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **duo costumes for best friends market size & sales**
Units sold, revenue, conversion and listing quality across the tracked shelf.
- **Units sold / yr**
- **750–1K**
- avg 0–100/product
- **Revenue / yr**
- **$24K–$32K**
- units × avg price
- **Conversion rate**
- **0.1%**
- **Avg BSR**
- **#3,195**
- **Page quality**
- **0%**
- **Prime**
- **96%**
- **Sponsored**
- **69%**
- **Out of stock**
- **21.7%**
- **Avg brand age**
- **35 months**
- **Avg seller age**
- **187 days**
## **Competition: brands, sellers & click share**
The top 5 products take 41% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**41 **▲rising
**Sellers**
**55**
**Top-5 brand share**
**47%**
Top 20: 82%
**Top-5 click share**
**41%**
Top 20: 74%
**Open market**
**49%**
- DORISUBE18% - Lianshp10% - Tvnxdgl8% - inkArts5% - YOKVAN5% - PIIDUOO4%
## **duo costumes for best friends demand & seasonality**
Weekly Amazon search volume, last 79 weeks — +13.2% search growth over the last 90 days.
90K70KSpike '25Spike '26 seasonJanFebMarAprMayJunJulAugSepOctNovDecJanFebMarAprMayJun
Peak months: Sep, Oct, Nov · busiest ÷ quietest = 106.5×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/duo-costumes-for-best-friends/trend)
## **Top duo costumes for best friends search terms shoppers use**
The exact queries shoppers type, with yearly volume, growth and conversion.
- **duo costumes**138K/yr-0.5%0.2% conv. - **dynamic duo costumes**22K/yr+0.0%0.2% conv. - **twin costumes for adults**20K/yr+123.5%0.2% conv. - **duo halloween costumes**61K/yr+100.6%0.0% conv. - **duo costume**24K/yr-13.4%0.1% conv. - **matching costumes for best friends**15K/yr+39.4%0.0% conv. - **best friend halloween costumes**27K/yr+42.8%0.0% conv. - **halloween costumes duo**16K/yr+58.6%0.0% conv. - **halloween duo costumes**10K/yr+153.8%0.0% conv. - **duo halloween costumes for best friends**27K/yr-45.5%0.0% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/duo-costumes-for-best-friends/search-terms)
## **Top duo costumes for best friends products & what they sell for**
Every tracked product — its share of the shelf, its review moat, and what it sells for.
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%3%$3686%$7369%$1K12%$1K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Lianshp Adult Animal and Sea Creature Onesie Pajamas Halloween Cosplay Costume Blue**Lianshp**$26.02**4.4★204 rev](https://www.amazon.com/dp/B0D4YBLL2X) [2**Women Lola #10 Jersey Space Movie Halloween Costumes Cheerleading Top & Shorts Outfit with 4pcs Accessories Crop Outfit Medium**DORISUBE**$24.88**4.2★146 rev](https://www.amazon.com/dp/B0CG946CP7) [3**Tvnxdgl Grady Twins Costume Women Creepy Twin Sisters Dress Halloween Blue Puff Sleeves Cosplay Dress Daisy Hair Clip Set M**Tvnxdgl**$28.62**4.1★16 rev](https://www.amazon.com/dp/B0FFBD3SS2) [4**Women Lola #10 Jersey Space Movie Halloween Costumes Cheerleading Top & Shorts Outfit with 4pcs Accessories Crop Outfit Large**DORISUBE**$24.42**4.2★146 rev](https://www.amazon.com/dp/B0CG95H5RF) [5**inkArts Shark Blanket Hoodie - Adult Shark Sleeping Bag & Cozy Flannel Hoodie**inkArts**$20.13**4.2★4,873 rev](https://www.amazon.com/dp/B0CH9TWC91)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**6PCS Men Characters Costumes in Talladega Nights Blue Short Sleeve Shirt with Sunglasses Hat Gloves Props Cosplay Set Car Driver Sports for Halloween Cosplay Party Full Suit Set**WooHand**$26.08**56 rev11mo ago](https://www.amazon.com/dp/B0FHVBWL7P) [**DAHAKII Funny 2-Person Inflatable Alpaca Costume Dual Person Team-Building Blow Up Suit/Outfit for Adults/Halloween/Cosplay/Mardi Gras**DAHAKII**$35.52**16 rev12mo ago](https://www.amazon.com/dp/B0FHKZN8ZJ) [**Adult Traffic Light Costume Tunic for Men and Women | Funny Halloween Party Outfit for Costume Events or Parades Standard**Fun Costumes**$60.79**8 rev1y ago](https://www.amazon.com/dp/B0FFHDDJXM) [**Tvnxdgl Grady Twins Costume Women Creepy Twin Sisters Dress Halloween Blue Puff Sleeves Cosplay Dress Daisy Hair Clip Set M**Tvnxdgl**$28.62**16 rev1y ago](https://www.amazon.com/dp/B0FFBD3SS2) [**QRT Super Bros Costume Kit with Hat Mustaches Suspenders Gloves Buttons ang Glasses frame for Halloween Cosplay and Christmas (red&green)**QRT**$22.71**140 rev1y ago](https://www.amazon.com/dp/B0F86JD1F1)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Women Lola #10 Jersey Space Movie Halloween Costumes Cheerleading Top & Shorts Outfit with 4pcs Accessories Crop Outfit Medium**DORISUBE**$24.88**4.2★**▲ 643%**](https://www.amazon.com/dp/B0CG946CP7) [**DC Comics Robin Glitter Logo Juniors Costume Cosplay Cape T-Shirt Tee Shirt Batman (Large) Red**Bioworld**$25.98**3.6★**▲ 633%**](https://www.amazon.com/dp/B0B95WYX21) [**Tvnxdgl Grady Twins Costume Women Creepy Twin Sisters Dress Halloween Blue Puff Sleeves Cosplay Dress Daisy Hair Clip Set M**Tvnxdgl**$28.62**4.1★**▲ 623%**](https://www.amazon.com/dp/B0FFBD3SS2) [**Lianshp Adult Animal and Sea Creature Onesie Pajamas Halloween Cosplay Costume Blue**Lianshp**$26.02**4.4★**▲ 526%**](https://www.amazon.com/dp/B0D4YBLL2X) [**FancyFun 3 Pcs Referee Shirt Costume Referee Costume Women Men V-Neck Ref Umpire Shirt for Soccer Football Player L**FancyFun**$12.50**4.5★**▲ 450%**](https://www.amazon.com/dp/B0D91L5GJH)
**~~View all trending →~~**
## **What reviews say buyers love and hate about duo costumes for best friends**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**16%
*“Quality is good. when is a wig ever comfy”*
**Size-Overall**13%
*“Fit great”*
**Value For Money**13%
*“Great value”*
**Gifting Purpose**8%
*“Great gift idea”*
**Fun/Entertainment Experience**8%
*“Can be enjoyed by two children”*
**Comfort-Overall**6%
*“is very comfortable”*
**Soft Feel**5%
*“Very soft”*
**Advertised Vs Actual Product**5%
*“As described”*
**Material Quality**3%
*“The material feels nice on the skin, and it is perfect for relaxing, sleeping, or just having fun”*
**Adhesion/Stickiness**3%
*“Nice and sticky”*
### **What buyers complain about **
**Size-Overall**28%
*“Too small”*
**Durability**10%
*“broke after one try”*
**Quality-Overall**8%
*“not well made”*
**Adhesion/Stickiness**7%
*“Don't use more than once maybe twice as adhesive is not made for multiple on/off”*
**Product Condition**5%
*“Used, dirty and damaged”*
**Instructions/User Manual/Troubleshooting**4%
*“reading instructions ahead of time”*
**Gap/Hole**4%
*“Arrived with hole”*
**Stitch/Finish/Polish**4%
*“Seams are trash”*
**Material Quality**2%
*“the material is super cheap the buttons had to be sewn on”*
**Advertised Vs Actual Product**2%
*“This was nothing like the picture”*
### **Top return reasons **
**Size-Overall**51%
**Length**10%
**Advertised Vs Actual Product**4%
**Gap/Hole**3%
**Material Quality**3%
**Quality-Overall**2%
**Product Condition**2%
**Value For Money**2%
**Defective Material/Parts**2%
**Stitch/Finish/Polish**2%
## **Common duo costumes for best friends questions**
- **Is duo costumes for best friends profitable to sell on Amazon United States?**
- The niche generates $12K/yr across 51 tracked products. 1 of 6 products launched in the last 360 days are still selling. 90-day search growth is +13.2%. Flapen's verdict: Skip it (46/100).
- **How competitive is the duo costumes for best friends niche?**
- 41 brands and 55 sellers compete. The top 5 products take 41% of clicks and top 5 brands hold 47% of demand.
- **What do buyers complain about in duo costumes for best friends?**
- Top complaints mined from reviews: Size-Overall, Durability, Quality-Overall. The return rate is 9.3% — above our launch gate.
- **When does demand for duo costumes for best friends peak?**
- Demand peaks in Sep–Oct–Nov; the busiest month runs 106.5× the quietest.
- **What does it cost to enter the duo costumes for best friends niche?**
- Listings span $8.76–$96.96; the average listing price is $32.06 (sweet spot $15–$100). The average incumbent carries 419 reviews — the moat a new listing must climb.
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