---
title: "Womens Halloween Costume Adult — £22K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/fashion/womens-halloween-costume-adult"
last_updated: "2026-07-31T11:55:17.216Z"
locale: en
meta:
description: "Niche score 29/100 · £22K/yr market · 728K searches/yr · £15.96 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 29/100 · £22K/yr market · 728K searches/yr · £15.96 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Womens Halloween Costume Adult — £22K/yr Amazon UK Niche (2026) - Flapen"
---
# **womens halloween costume adult**
**Skip it**
Weak search conversion (0.2%) — this niche doesn't clear our bar today.
Market size 6Growth 13Conversion 2Competition 8Returns 33Price range 63Avg price 77Brand share 17Review moat 63Quality gap 98
**Quality gap**
**Incredible****3.7★**
avg incumbent rating — lower means beatable quality
**Avg price**
**Great****£15.96**
avg listing price — sweet spot $15–$100
**Review moat**
**Good****990.89**
avg incumbent reviews — the moat a new listing must climb
**Price range**
**Good****£4.96–£31.86**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Returns**
**Okay****4.4%**
return rate — above 5% kills the launch gate
**Brand share**
**Bad****93%**
top-5 brand share — brand-locked demand
**Growth**
**Bad****-23.7%**
90-day search growth — must beat 0% to launch
**Competition**
**Bad****90%**
top-5 click share — a locked-up shelf
**Market size**
**Bad****£22K**
£22K/yr · 728K searches
**Conversion**
**Bad****0.2%**
search→purchase rate — share of searches ending in a sale
**Signals**[** Low Review Barrier**](https://flapen.com/research/niches?market=uk&signal=low_review_barrier "Top brand's reviews < 500") [** Quality Gap**](https://flapen.com/research/niches?market=uk&signal=quality_gap "Avg rating < 4.0")
According to Flapen's Amazon United Kingdom niche tracking, womens halloween costume adult is a £22K/yr Amazon United Kingdom market (728K searches/yr). The top 5 brands hold 93% of demand. Demand peaks in Oct–Nov. Verdict: Skip it — 29/100.
Data updated Jul 23, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **womens halloween costume adult market data**
- **Units sold / yr**
- **3K–3K**
- avg 0–100/product
- **Revenue / yr**
- **£40K–£48K**
- units × avg price
- **Conversion rate**
- **0.2%**
- **Avg BSR**
- **#596**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **67%**
- **Out of stock**
- **16.9%**
- **Avg brand age**
- **38 months**
- **Avg seller age**
- **199 days**
## **Competition & brand share**
The top 5 products capture 90% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**8 **▲rising
**Sellers**
**44**
**Top-5 brand share**
**93%**
Top 20: 100%
**Top-5 click share**
**90%**
Top 20: 100%
**Open market**
**4%**
- RSLOVE37% - Smiffys34% - HENBRANDT13% - SEAUR5% - Fortunezone3% - DELIMALI3% - Open — no brand owns it (2 brands, 4%)
## **Demand & seasonality**
Weekly Amazon search volume, last 90 weeks — -23.7% search growth over the last 90 days.
225K175KSpike '25Spike '26 seasonNovDecJanFebMarAprMayJunJulAugSepOctNovDecJanFebMarAprMayJun
Peak months: Oct, Nov · busiest ÷ quietest = 377.4×
[**Open Trend **](https://flapen.com/research/uk/fashion/womens-halloween-costume-adult/trend)
## **Top womens halloween costume adult search terms**
- **costume women**46K/yr-36.4%0.0% conv. - **womens halloween costume adult**667K/yr+22.9%0.0% conv. - **halloween costumes plus size**14K/yr+8.9%0.0% conv. [**All search terms **](https://flapen.com/research/uk/fashion/womens-halloween-costume-adult/search-terms)
## **Top womens halloween costume adult 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%£2K20%£4K30%£7K40%£9K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 9 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**RSLOVE Women Lingerie Sets Costume - Sexy Maid Outfits Sleepwear Dress for Halloween Cosplay Black Medium**RSLOVE**£14.73**4.2★218 rev](https://www.amazon.co.uk/dp/B0DH268DNS) [2**Smiffys Grease Pink Ladies Jacket for Women Pink Jacket with Embroidered Logo Officially Licensed Ideal for Matching Group Outfits Fancy Dress and Playful Music-Themed Events Halloween**Smiffys**£12.30**4.2★3,768 rev](https://www.amazon.co.uk/dp/B001553416) [3**HENBRANDT Adult Womens Roman Lady Mini Dress with Shawl and Headpiece Short White Toga Fancy Dress Costume Ancient History Dress Up Outfit One Size Ladies Fancy Dress Costume**HENBRANDT**£8.79**4.0★290 rev](https://www.amazon.co.uk/dp/B00SJJ6OPE) [4**SEAUR Womens Faux Leather Lingerie Mini Dress PU V Neck Backless Babydoll Dress Wet Look Halloween Costumes Party Nightwear with Thongs Pink M**SEAUR**£19.74**2.5★9 rev](https://www.amazon.co.uk/dp/B0FSKLT4QG) [5**Fortunezone Princess Leia Costume Adult Halloween Cosplay White Long Dress with Belt**Fortunezone**£31.86**4.1★18 rev](https://www.amazon.co.uk/dp/B0DX1ZSXW2)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**SEAUR Womens Faux Leather Lingerie Mini Dress PU V Neck Backless Babydoll Dress Wet Look Halloween Costumes Party Nightwear with Thongs Pink M**SEAUR**£19.74**9 rev10mo ago](https://www.amazon.co.uk/dp/B0FSKLT4QG) [**SGFNXB Halloween Costumes Adult Women 5 PCS Witch Costumes Set Witch Cape Hat Gloves Stockings and Broom World Book Day Costume for Halloween Christmas Cosplay and Themed Parties for 14+**SGFNXB**£23.79**12 rev11mo ago](https://www.amazon.co.uk/dp/B0FLJT8K64) [**Fortunezone Princess Leia Costume Adult Halloween Cosplay White Long Dress with Belt**Fortunezone**£31.86**18 rev1y ago](https://www.amazon.co.uk/dp/B0DX1ZSXW2) [**RSLOVE Women Lingerie Sets Costume - Sexy Maid Outfits Sleepwear Dress for Halloween Cosplay Black Medium**RSLOVE**£14.73**218 rev1y ago](https://www.amazon.co.uk/dp/B0DH268DNS) [**URAQT Tulle Tutu Skirts for Women LED Light Up Tutu Skirts Sequins Stars Elastic Tutu Adult Teen Skirt Ballet Dance Festival Outfit Halloween Party Costume # Black**URAQT**£4.96**824 rev2y ago](https://www.amazon.co.uk/dp/B0D8WHQDB1)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**SEAUR Womens Faux Leather Lingerie Mini Dress PU V Neck Backless Babydoll Dress Wet Look Halloween Costumes Party Nightwear with Thongs Pink M**SEAUR**£19.74**2.5★**▲ 302%**](https://www.amazon.co.uk/dp/B0FSKLT4QG) [**Fortunezone Princess Leia Costume Adult Halloween Cosplay White Long Dress with Belt**Fortunezone**£31.86**4.1★**▲ 280%**](https://www.amazon.co.uk/dp/B0DX1ZSXW2) [**Smiffys Grease Pink Ladies Jacket for Women Pink Jacket with Embroidered Logo Officially Licensed Ideal for Matching Group Outfits Fancy Dress and Playful Music-Themed Events Halloween**Smiffys**£12.30**4.2★**▲ 237%**](https://www.amazon.co.uk/dp/B001553416) [**RSLOVE Women Lingerie Sets Costume - Sexy Maid Outfits Sleepwear Dress for Halloween Cosplay Black Medium**RSLOVE**£14.73**4.2★**▲ 193%**](https://www.amazon.co.uk/dp/B0DH268DNS) [**HENBRANDT Adult Womens Roman Lady Mini Dress with Shawl and Headpiece Short White Toga Fancy Dress Costume Ancient History Dress Up Outfit One Size Ladies Fancy Dress Costume**HENBRANDT**£8.79**4.0★**▲ 93%**](https://www.amazon.co.uk/dp/B00SJJ6OPE)
**~~View all trending →~~**
## **What buyers say about womens halloween costume adult**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Advertised Vs Actual Product**100%
*“Perfect and as described”*
### **What buyers complain about **
**Thin**100%
*“Very thin,”*
### **Top return reasons **
**Size-Overall**55%
**Thin**9%
**Quality-Overall**7%
**Material Quality**7%
**Stitch/Finish/Polish**5%
**Color**4%
**Advertised Vs Actual Product**3%
**Shape/Style**2%
**Strap/String Quality**1%
**Waist Fit**1%
## **Common questions**
- **Is womens halloween costume adult profitable to sell on Amazon United Kingdom?**
- The niche generates £22K/yr across 9 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is -23.7%. Flapen's verdict: Skip it (29/100).
- **How competitive is the womens halloween costume adult niche?**
- 8 brands and 44 sellers compete. The top 5 products take 90% of clicks and top 5 brands hold 93% of demand.
- **What do buyers complain about in womens halloween costume adult?**
- Top complaints mined from reviews: Thin. The return rate is 4.4%.
- **When does demand for womens halloween costume adult peak?**
- Demand peaks in Oct–Nov; the busiest month runs 377.4× the quietest.
- **What does it cost to enter the womens halloween costume adult niche?**
- Listings span £4.96–£31.86; the average listing price is £15.96 (sweet spot $15–$100). The average incumbent carries 991 reviews — the moat a new listing must climb.
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