---
title: "Hungry Caterpillar Costume — £34K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/fashion/hungry-caterpillar-costume"
last_updated: "2026-07-31T18:27:37.371Z"
locale: en
meta:
description: "Niche score 36/100 · £34K/yr market · 126K searches/yr · £14.82 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 36/100 · £34K/yr market · 126K searches/yr · £14.82 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Hungry Caterpillar Costume — £34K/yr Amazon UK Niche (2026) - Flapen"
---
# **hungry caterpillar costume**
**Skip it**
Soft demand (-92.6% this quarter) — this niche doesn't clear our bar today.
Market size 8Growth 0Conversion 23Competition 56Returns 30Price range 53Avg price 74Brand share 53Review moat 91Quality gap 52
**Review moat**
**Great****179.46**
avg incumbent reviews — the moat a new listing must climb
**Avg price**
**Good****£14.82**
avg listing price — sweet spot $15–$100
**Competition**
**Good****52%**
top-5 click share — leaders hold, buyers still browse
**Brand share**
**Good****73%**
top-5 brand share — brands hold most of the demand
**Price range**
**Good****£9.00–£21.74**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Quality gap**
**Good****4.4★**
avg incumbent rating — lower means beatable quality
**Returns**
**Okay****4.6%**
return rate — above 5% kills the launch gate
**Conversion**
**Bad****1.8%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Bad****£34K**
£34K/yr · 126K searches
**Growth**
**Bad****-92.6%**
90-day search growth — must beat 0% to launch
**Signals**[** Low Review Barrier**](https://flapen.com/research/niches?market=uk&signal=low_review_barrier "Top brand's reviews < 500")
According to Flapen's Amazon United Kingdom niche tracking, hungry caterpillar costume is a £34K/yr Amazon United Kingdom market (126K searches/yr). The top 5 brands hold 73% of demand. Demand peaks in Feb–Mar. Verdict: Skip it — 36/100.
Data updated Jul 23, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **hungry caterpillar costume market data**
- **Units sold / yr**
- **1K–2K**
- avg 0–100/product
- **Revenue / yr**
- **£19K–£22K**
- units × avg price
- **Conversion rate**
- **1.8%**
- **Avg BSR**
- **#980**
- **Page quality**
- **0%**
- **Prime**
- **88%**
- **Sponsored**
- **50%**
- **Out of stock**
- **22.2%**
- **Avg brand age**
- **39 months**
- **Avg seller age**
- **193 days**
## **Competition & brand share**
The top 5 products take 52% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**12 **▲rising
**Sellers**
**26**
**Top-5 brand share**
**73%**
Top 20: 100%
**Top-5 click share**
**52%**
Top 20: 95%
**Open market**
**21%**
- generic28% - Rubies13% - Fun Shack12% - Eric Carle11% - Blues Group10% - Smiffys5%
## **Demand & seasonality**
Weekly Amazon search volume, last 72 weeks — -92.6% search growth over the last 90 days.
40K30KSpike '25Spike '26 seasonMarAprMayJunJulAugSepOctNovDecJanFebMarAprMayJun
Peak months: Feb, Mar · busiest ÷ quietest = 83.4×
[**Open Trend **](https://flapen.com/research/uk/fashion/hungry-caterpillar-costume/trend)
## **Top hungry caterpillar costume search terms**
- **caterpillar costume**18K/yr-66.1%1.4% conv. - **hungry caterpillar costume**59K/yr-96.9%1.3% conv. - **caterpillar costume kids**7K/yr-66.0%2.1% conv. - **the hungry caterpillar costume**16K/yr-96.4%0.4% conv. - **very hungry caterpillar costume**11K/yr-96.6%0.0% conv. - **the very hungry caterpillar costume**11K/yr-96.9%1.3% conv. - **hungry caterpillar costume kids**5K/yr-98.3%3.8% conv. [**All search terms **](https://flapen.com/research/uk/fashion/hungry-caterpillar-costume/search-terms)
## **Top hungry caterpillar 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%5%£2K10%£3K15%£5K20%£7K1101001K 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**Unisex Caterpillar Onesie Fancy Dress Costume Hoody Pyjama Sleep wear Carnival Costume S(height 150cm-160cm)**generic**£17.56**4.1★36 rev](https://www.amazon.co.uk/dp/B07D2MF46W) [2**Eric Carle The Very Hungry Caterpillar Kids Red Long Sleeve Pyjama Set | Crew Neck Cartoon Nightwear | Boys Girls Long Leg PJs for Bedtime & Sleepover Merch - 12-18 Months**Eric Carle**£16.28**5.0★4 rev](https://www.amazon.co.uk/dp/B0GGCVBTHQ) [3**Unisex Caterpillar Onesie Fancy Dress Costume Hoody Pyjama Sleep wear Carnival Costume L(height 170cm-180cm)**generic**£17.49**4.1★36 rev](https://www.amazon.co.uk/dp/B07D2N74XJ) [4**Bristol Novelty Childrens Caterpillar Costume Age 6-8 years old Halloween**Rubies**£11.61**4.3★384 rev](https://www.amazon.co.uk/dp/B07L445TB4) [5**Smiffys Official The Very Hungry Caterpillar Costume for Children Licensed Storybook Fancy Dress with Easy Wear Tabard & Separate Character Hood Unisex Kids Costume World Book Day Age 1-2**Smiffys**£10.56**5.0★3 rev](https://www.amazon.co.uk/dp/B0GNSXLVSW)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Smiffys Official The Very Hungry Caterpillar Costume for Children Licensed Storybook Fancy Dress with Easy Wear Tabard & Separate Character Hood Unisex Kids Costume World Book Day Age 1-2**Smiffys**£10.56**3 rev5mo ago](https://www.amazon.co.uk/dp/B0GNSXLVSW) [**Eric Carle The Very Hungry Caterpillar Kids Red Long Sleeve Pyjama Set | Crew Neck Cartoon Nightwear | Boys Girls Long Leg PJs for Bedtime & Sleepover Merch - 12-18 Months**Eric Carle**£16.28**4 rev6mo ago](https://www.amazon.co.uk/dp/B0GGCVBTHQ) [**Kavoc Caterpillar Costume Set Includes Caterpillar Headband Hat and Self Adhesive Felt Foods Fruits Stickers for World Book Day Cosplay**Kavoc**£12.22**5 rev7mo ago](https://www.amazon.co.uk/dp/B0G7F4KMH1) [**Aleshime Caterpillar Costume for Kids Toddlers World Book Day Costume Fancy Dress for Girls and Boys Age 3-12Y(Rainbow)**Aleshime**£15.31**3 rev7mo ago](https://www.amazon.co.uk/dp/B0G6RVRH5G) [**Blues Group Officially Licensed The Very Hungry Caterpillar Unisex Kids Value Costume | World Book Day Dress-Up and Fancy Dress | Ages 3-8| (4-6 Years)**Blues Group**£13.67**8 rev8mo ago](https://www.amazon.co.uk/dp/B0G3QB393G)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**FeMereina Halloween Costumes Toddler Baby Boy Girl Animal Chick Romper Sleeveless Zip Up Hooded Cosplay Jumpsuit with Striped Socks (Yellow 12-18 Months)**FeMereina**£9.05**4.8★**▲ 769%**](https://www.amazon.co.uk/dp/B0CFHFWSRC) [**FeMereina Halloween Costumes Toddler Baby Boy Girl Animal Chick Romper Sleeveless Zip Up Hooded Cosplay Jumpsuit with Striped Socks (Yellow 18-24 Months)**FeMereina**£9.62**4.8★**▲ 735%**](https://www.amazon.co.uk/dp/B0CFHC5ZNN) [**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★**▲ 606%**](https://www.amazon.co.uk/dp/B0CFHD7RYG) [**Unisex Caterpillar Onesie Fancy Dress Costume Hoody Pyjama Sleep wear Carnival Costume L(height 170cm-180cm)**generic**£17.49**4.1★**▲ 283%**](https://www.amazon.co.uk/dp/B07D2N74XJ) [**Blues Group Officially Licensed The Very Hungry Caterpillar Unisex Kids Value Costume | World Book Day Dress-Up and Fancy Dress | Ages 3-8| (3-4 Years)**Blues Group**£13.35**4.9★**▲ 136%**](https://www.amazon.co.uk/dp/B0G3QFMCY2)
**~~View all trending →~~**
## **What buyers say about hungry caterpillar costume**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**27%
*“Right size”*
**Quality-Overall**26%
*“Well made, good quality and vibrant colours though”*
**Advertised Vs Actual Product**6%
*“exactly as you would expect it to be”*
**Developmental Needs**6%
*“Perfect for kids”*
**Value For Money**6%
*“And not too expensive either”*
**Color**4%
*“The rainbow colours are great, really vibrant and bright and I love the addition of the little feet”*
**Comfort-Overall**4%
*“seems comfortable”*
**Material Quality**4%
*“material is nice”*
**Ease Of Use**4%
*“easy to get on and off”*
**Design-Overall**3%
*“Good quality and well designed outfit”*
### **What buyers complain about **
**Size-Overall**27%
*“Sizes are massively out”*
**Durability**17%
*“Broke straight away”*
**Value For Money**14%
*“Not the cheapest”*
**Advertised Vs Actual Product**8%
*“False advertising”*
**Quality-Overall**8%
*“Quality not so good either for the price”*
**Stretchability/Expandability/Elasticity**3%
*“The costume came all perfect, material is nice, however, when to try it on, the elastic bad on one of the side came off from the seam”*
**Material Quality**1%
*“I think made of felt. it feels felt like though I can't find any material information on the listing”*
### **Top return reasons **
**Size-Overall**87%
**Quality-Overall**5%
**Advertised Vs Actual Product**2%
**Material Quality**1%
**Strap/String Quality**1%
**Stitch/Finish/Polish**1%
**Adhesion/Stickiness**1%
**Value For Money**1%
**Comfort-Overall**0%
**Inflation/Deflation**0%
## **Common questions**
- **Is hungry caterpillar costume profitable to sell on Amazon United Kingdom?**
- The niche generates £34K/yr across 24 tracked products. 0 of 10 products launched in the last 360 days are still selling. 90-day search growth is -92.6%. Flapen's verdict: Skip it (36/100).
- **How competitive is the hungry caterpillar costume niche?**
- 12 brands and 26 sellers compete. The top 5 products take 52% of clicks and top 5 brands hold 73% of demand.
- **What do buyers complain about in hungry caterpillar costume?**
- Top complaints mined from reviews: Size-Overall, Durability, Value For Money. The return rate is 4.6%.
- **When does demand for hungry caterpillar costume peak?**
- Demand peaks in Feb–Mar; the busiest month runs 83.4× the quietest.
- **What does it cost to enter the hungry caterpillar costume niche?**
- Listings span £9.00–£21.74; the average listing price is £14.82 (sweet spot $15–$100). The average incumbent carries 179 reviews — the moat a new listing must climb.
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