---
title: "Baby Halloween Costume — £10K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/fashion/baby-halloween-costume"
last_updated: "2026-07-31T08:13:36.566Z"
locale: en
meta:
description: "Niche score 37/100 · £10K/yr market · 680K searches/yr · £13.62 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 37/100 · £10K/yr market · 680K searches/yr · £13.62 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Baby Halloween Costume — £10K/yr Amazon UK Niche (2026) - Flapen"
---
# **baby halloween costume**
**Skip it**
Weak search conversion (0.1%) — this niche doesn't clear our bar today.
Market size 3Growth 15Conversion 1Competition 81Returns 37Price range 45Avg price 63Brand share 71Review moat 78Quality gap 21
**Competition**
**Great****34%**
top-5 click share — an open shelf
**Review moat**
**Great****444.51**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Good****62%**
top-5 brand share — brands hold most of the demand
**Avg price**
**Good****£13.62**
avg listing price — sweet spot $15–$100
**Price range**
**Okay****£7.37–£21.27**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Returns**
**Okay****4.1%**
return rate — above 5% kills the launch gate
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Growth**
**Bad****-19.7%**
90-day search growth — must beat 0% to launch
**Market size**
**Bad****£10K**
£10K/yr · 680K searches
**Conversion**
**Bad****0.1%**
search→purchase rate — share of searches ending in a sale
According to Flapen's Amazon United Kingdom niche tracking, baby halloween costume is a £10K/yr Amazon United Kingdom market (680K searches/yr). The top 5 brands hold 62% of demand. Demand peaks in Sep–Oct–Nov. Verdict: Skip it — 37/100.
Data updated Jul 23, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **baby halloween costume market data**
- **Units sold / yr**
- **4K–5K**
- avg 0–100/product
- **Revenue / yr**
- **£54K–£68K**
- units × avg price
- **Conversion rate**
- **0.1%**
- **Avg BSR**
- **#191**
- **Page quality**
- **0%**
- **Prime**
- **89%**
- **Sponsored**
- **84%**
- **Out of stock**
- **18.9%**
- **Avg brand age**
- **41 months**
- **Avg seller age**
- **192 days**
## **Competition & brand share**
Clicks spread well past the top 5 (34% combined) — an open shelf where new products get seen.
**Brands**
**28 **▼falling
**Sellers**
**61**
**Top-5 brand share**
**62%**
Top 20: 95%
**Top-5 click share**
**34%**
Top 20: 71%
**Open market**
**32%**
- Disney30% - Nicoxijia11% - BABWWNIX9% - Sxkayxr7% - Carolilly5% - WERNZATT5%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -19.7% search growth over the last 90 days.
150K100KSpike '24Spike '25Prime Day '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Sep, Oct, Nov · busiest ÷ quietest = 187.1×
[**Open Trend **](https://flapen.com/research/uk/fashion/baby-halloween-costume/trend)
## **Top baby halloween costume search terms**
- **baby costume**36K/yr-56.7%0.1% conv. - **baby halloween costume**276K/yr+113.5%0.0% conv. - **baby fancy dress**15K/yr-55.3%0.1% conv. - **baby halloween costume 0-3 months**16K/yr+107.4%0.0% conv. - **baby halloween costume 6-9 months**38K/yr+111.5%0.2% conv. - **baby halloween**20K/yr+202.3%0.0% conv. - **baby halloween outfit**13K/yr+184.5%0.0% conv. - **baby halloween costumes 12-18 months**61K/yr+25.3%0.0% conv. - **baby halloween costume 9-12 months**33K/yr+216.2%0.0% conv. - **newborn halloween costume**14K/yr+13.6%0.0% conv. [**All search terms **](https://flapen.com/research/uk/fashion/baby-halloween-costume/search-terms)
## **Top baby halloween 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%3%£3066%£6119%£91712%£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**Nicoxijia Toddler Baby Halloween Costume Fuzzy Warm Hooded Romper Funny Cosplay Zip-Up Jumpsuit Fall Winter Animal Outfit (Blue 6-12 Months)**Nicoxijia**£17.95**4.6★105 rev](https://www.amazon.co.uk/dp/B0D66R8FRB) [2**Disney Sleepsuit with Hat | The Incredibles Baby Grow | Newborn Sleepsuit | Baby Sleepwear Set Red 12-18 Months**Disney**£13.45**4.6★1,930 rev](https://www.amazon.co.uk/dp/B07KR9ZCP2) [3**Sxkayxr Cartoon Newborn Baby Boys Girls Romper Goku-Inspired Infant Outfit Jumpsuit Clothes**Sxkayxr**£15.01**4.5★1,439 rev](https://www.amazon.co.uk/dp/B08ZCLC77M) [4**Baby Boy Girl Dinosaur Costume Sleeveless Animals Hooded Romper Infants Cartoon Halloween Cosplay Costumes Jumpsuit (Turquoise 0-3 Months)**BABWWNIX**£12.68**5.0★6 rev](https://www.amazon.co.uk/dp/B0FPGF4XLK) [5**Disney Baby Boys Toy Story 4 Buzz Lightyear Babygrow + Bandanna 12-18 Months**Disney**£10.46**4.7★501 rev](https://www.amazon.co.uk/dp/B07YN1BQFK)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Baby Boy Girl Dinosaur Costume Sleeveless Animals Hooded Romper Infants Cartoon Halloween Cosplay Costumes Jumpsuit (Turquoise 0-3 Months)**BABWWNIX**£12.68**6 rev10mo ago](https://www.amazon.co.uk/dp/B0FPGF4XLK) [**Baby Boy Girl Dinosaur Costume Sleeveless Animals Hooded Romper Infants Cartoon Halloween Cosplay Costumes Jumpsuit (Turquoise 3-6 Months)**BABWWNIX**£12.79**6 rev10mo ago](https://www.amazon.co.uk/dp/B0FPGDH5MF) [**BeliBacca Newborn Halloween Prisoner Outfits Infant Baby Fall Winter Casual Bodysuit Long Sleeve Letter Print Striped Romper Pants Hats Set (White 0-3 Months)**BeliBacca**£10.95**11 rev1y ago](https://www.amazon.co.uk/dp/B0FH21HVHH) [**Carolilly Baby Boys Dinosaur Outfits Winter Warm Infant Baby Jumpsuit Newborn Hood Romper Plush Sleeveless Bodysuits Toddler Halloween Clothes (Green 0-3 Months)**Carolilly**£9.95**6 rev1y ago](https://www.amazon.co.uk/dp/B0FGN9PF7Q) [**Geagodelia My First Halloween Baby Girl Outfit Cute Pumpkin Print Long Sleeve One Piece Halloween Baby Clothes with Headband (Cutest Little Pumpkin Khaki 0-3 Months)**Geagodelia**£7.94**16 rev1y ago](https://www.amazon.co.uk/dp/B0FD3HLKC9)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**culbutomind Baby Twins Bodysuit Ketchup Mustard Newborn Baby Outfits Unisex Romper Infant Jumpsuit**culbutomind**£19.75**4.7★**▲ 272%**](https://www.amazon.co.uk/dp/B07Q6B9399) [**FeMereina Halloween Costumes Toddler Baby Boy Girl Animal Chick Romper Sleeveless Zip Up Hooded Cosplay Jumpsuit with Striped Socks (Yellow 0-6 Months)**FeMereina**£9.00**4.8★**▲ 255%**](https://www.amazon.co.uk/dp/B0CFHD7RYG) [**Disney Baby Boys Toy Story Sleepsuit Buzz Lightyear Multicoloured Age 6 to 9 Months**Disney**£12.99**4.5★**▲ 227%**](https://www.amazon.co.uk/dp/B07WHD2MVD) [**Disney Baby Boys Toy Story 4 Buzz Lightyear Babygrow + Bandanna 12-18 Months**Disney**£10.46**4.7★**▲ 199%**](https://www.amazon.co.uk/dp/B07YN1BQFK) [**SYHVGI Toddler Baby Girls Boys Fleece Jumpsuit Cartoon Animal Horn Hooded Rompers Halloween Carnival Cosplay Outfits (Blue 6-12 Months)**SYHVGI**£15.81**5.0★**▲ 191%**](https://www.amazon.co.uk/dp/B0FBR1HMC8)
**~~View all trending →~~**
## **What buyers say about baby halloween costume**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**31%
*“Good quality costume”*
**Size-Overall**28%
*“It fitted my 4 month old perfectly”*
**Value For Money**16%
*“A great price”*
**Warmth**9%
*“wasn't too fluffy or hot so I didn't have to worry about her overheating”*
**Advertised Vs Actual Product**6%
*“As described,”*
**Stretchability/Expandability/Elasticity**3%
*“it has stretch”*
**Portability**3%
*“is also very practical for when taking the baby swimming”*
**Soft Feel**3%
*“The fabric feels really soft”*
### **What buyers complain about **
**Size-Overall**100%
*“Ridiculous sizing”*
### **Top return reasons **
**Size-Overall**89%
**Ease Of Use**2%
**Material Quality**2%
**Heating**1%
**Product Condition**1%
**Length**1%
**Quality-Overall**1%
**Feet Fit**1%
**Wrinkles**1%
**Stitch/Finish/Polish**1%
## **Common questions**
- **Is baby halloween costume profitable to sell on Amazon United Kingdom?**
- The niche generates £10K/yr across 57 tracked products. 0 of 7 products launched in the last 360 days are still selling. 90-day search growth is -19.7%. Flapen's verdict: Skip it (37/100).
- **How competitive is the baby halloween costume niche?**
- 28 brands and 61 sellers compete. The top 5 products take 34% of clicks and top 5 brands hold 62% of demand.
- **What do buyers complain about in baby halloween costume?**
- Top complaints mined from reviews: Size-Overall. The return rate is 4.1%.
- **When does demand for baby halloween costume peak?**
- Demand peaks in Sep–Oct–Nov; the busiest month runs 187.1× the quietest.
- **What does it cost to enter the baby halloween costume niche?**
- Listings span £7.37–£21.27; the average listing price is £13.62 (sweet spot $15–$100). The average incumbent carries 445 reviews — the moat a new listing must climb.
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