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.

duo costumes for best friends

Skip it

Weak search conversion (0.1%) — this niche doesn't clear our bar today.

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

Great47%

top-5 brand share — no brand owns this niche

Review moat

Great419.27

avg incumbent reviews — the moat a new listing must climb

Competition

Good41%

top-5 click share — leaders hold, buyers still browse

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Growth

Okay+13.2%

90-day search growth — must beat 0% to launch

Returns

Bad9.3%

return rate — above 5% kills the launch gate

Market size

Bad$12K

$12K/yr · 547K searches

Conversion

Bad0.1%

search→purchase rate — share of searches ending in a sale

Signals No Dominant Brand Low Review Barrier High Returns

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

Competition & brand share

The top 5 products take 41% of clicks — established leaders, but buyers still shop beyond them.

Brands

41 rising

Sellers

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%

Demand & seasonality

Weekly Amazon search volume, last 79 weeks — +13.2% search growth over the last 90 days.

Peak months: Sep, Oct, Nov · busiest ÷ quietest = 106.5×

Open Trend

Top duo costumes for best friends search terms

duo costumes138K/yr -0.5%0.2% conv.
dynamic duo costumes22K/yr +0.0%0.2% conv.
twin costumes for adults20K/yr +123.5%0.2% conv.
duo halloween costumes61K/yr +100.6%0.0% conv.
duo costume24K/yr -13.4%0.1% conv.
matching costumes for best friends15K/yr +39.4%0.0% conv.
best friend halloween costumes27K/yr +42.8%0.0% conv.
halloween costumes duo16K/yr +58.6%0.0% conv.
halloween duo costumes10K/yr +153.8%0.0% conv.
duo halloween costumes for best friends27K/yr -45.5%0.0% conv.

All search terms

Top duo costumes for best friends 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.

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

Lianshp Adult Animal and Sea Creature Onesie Pajamas Halloween Cosplay Costume Blue

Lianshp$26.024.4★204 rev

Women Lola #10 Jersey Space Movie Halloween Costumes Cheerleading Top & Shorts Outfit with 4pcs Accessories Crop Outfit Medium

DORISUBE$24.884.2★146 rev

Tvnxdgl Grady Twins Costume Women Creepy Twin Sisters Dress Halloween Blue Puff Sleeves Cosplay Dress Daisy Hair Clip Set M

Tvnxdgl$28.624.1★16 rev

Women Lola #10 Jersey Space Movie Halloween Costumes Cheerleading Top & Shorts Outfit with 4pcs Accessories Crop Outfit Large

DORISUBE$24.424.2★146 rev

inkArts Shark Blanket Hoodie - Adult Shark Sleeping Bag & Cozy Flannel Hoodie

inkArts$20.134.2★4,873 rev

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$26.0856 rev

11mo ago

DAHAKII Funny 2-Person Inflatable Alpaca Costume Dual Person Team-Building Blow Up Suit/Outfit for Adults/Halloween/Cosplay/Mardi Gras

DAHAKII$35.5216 rev

12mo ago

Adult Traffic Light Costume Tunic for Men and Women | Funny Halloween Party Outfit for Costume Events or Parades Standard

Fun Costumes$60.798 rev

1y ago

Tvnxdgl Grady Twins Costume Women Creepy Twin Sisters Dress Halloween Blue Puff Sleeves Cosplay Dress Daisy Hair Clip Set M

Tvnxdgl$28.6216 rev

1y ago

QRT Super Bros Costume Kit with Hat Mustaches Suspenders Gloves Buttons ang Glasses frame for Halloween Cosplay and Christmas (red&green)

QRT$22.71140 rev

1y ago

What buyers say about duo costumes for best friends

What buyers praise and complain about, mined from review topics.

What buyers love

Quality-Overall16%

“Quality is good. when is a wig ever comfy”

Size-Overall13%

“Fit great”

Value For Money13%

“Great value”

Gifting Purpose8%

“Great gift idea”

Fun/Entertainment Experience8%

“Can be enjoyed by two children”

Comfort-Overall6%

“is very comfortable”

Soft Feel5%

“Very soft”

Advertised Vs Actual Product5%

“As described”

Material Quality3%

“The material feels nice on the skin, and it is perfect for relaxing, sleeping, or just having fun”

Adhesion/Stickiness3%

“Nice and sticky”

What buyers complain about

Size-Overall28%

“Too small”

Durability10%

“broke after one try”

Quality-Overall8%

“not well made”

Adhesion/Stickiness7%

“Don't use more than once maybe twice as adhesive is not made for multiple on/off”

Product Condition5%

“Used, dirty and damaged”

Instructions/User Manual/Troubleshooting4%

“reading instructions ahead of time”

Gap/Hole4%

“Arrived with hole”

Stitch/Finish/Polish4%

“Seams are trash”

Material Quality2%

“the material is super cheap the buttons had to be sewn on”

Advertised Vs Actual Product2%

“This was nothing like the picture”

Top return reasons

Size-Overall51%

Length10%

Advertised Vs Actual Product4%

Gap/Hole3%

Material Quality3%

Quality-Overall2%

Product Condition2%

Value For Money2%

Defective Material/Parts2%

Stitch/Finish/Polish2%

Common 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.

duo costumes for best friends