---
title: "Dolphin Knife — £59K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/diy-tools/dolphin-knife"
last_updated: "2026-07-31T08:31:47.618Z"
locale: en
meta:
description: "Niche score 46/100 · £59K/yr market · 91K searches/yr · £12.25 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 46/100 · £59K/yr market · 91K searches/yr · £12.25 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Dolphin Knife — £59K/yr Amazon UK Niche (2026) - Flapen"
---
# **dolphin knife**
**Skip it**
A small market ($59K/yr) — this niche doesn't clear our bar today.
Market size 15Growth 17Conversion 61Competition 73Returns 96Price range 50Avg price 52Brand share 16Review moat 86Quality gap 37
**Returns**
**Incredible****0.8%**
return rate — above 5% kills the launch gate
**Review moat**
**Great****273.62**
avg incumbent reviews — the moat a new listing must climb
**Competition**
**Good****41%**
top-5 click share — leaders hold, buyers still browse
**Conversion**
**Good****5.3%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Good****£12.25**
avg listing price — sweet spot $15–$100
**Price range**
**Good****£4.36–£25.61**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Growth**
**Bad****-15.8%**
90-day search growth — must beat 0% to launch
**Brand share**
**Bad****94%**
top-5 brand share — brand-locked demand
**Market size**
**Bad****£59K**
£59K/yr · 91K searches
According to Flapen's Amazon United Kingdom niche tracking, dolphin knife is a £59K/yr Amazon United Kingdom market (91K searches/yr). The top 5 brands hold 94% of demand. Demand peaks in Sep. Verdict: Skip it — 46/100.
Data updated Jul 22, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **dolphin knife market data**
- **Units sold / yr**
- **4K–5K**
- avg 100–250/product
- **Revenue / yr**
- **£49K–£61K**
- units × avg price
- **Conversion rate**
- **5.3%**
- **Avg BSR**
- **#30**
- **Page quality**
- **0%**
- **Prime**
- **97%**
- **Sponsored**
- **55%**
- **Out of stock**
- **15.6%**
- **Avg brand age**
- **59 months**
- **Avg seller age**
- **184 days**
## **Competition & brand share**
The top 5 products take 41% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**11 **▼falling
**Sellers**
**13**
**Top-5 brand share**
**94%**
Top 20: 100%
**Top-5 click share**
**41%**
Top 20: 90%
**Open market**
**4%**
- CCA65% - Barnwell10% - Dolphin7% - TradeUnderlay6% - PTL6% - DEKTON2% - Open — no brand owns it (5 brands, 4%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -15.8% search growth over the last 90 days.
3K2KHoliday '24Spike '25Prime Day '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Sep · busiest ÷ quietest = 2.0×
[**Open Trend **](https://flapen.com/research/uk/diy-tools/dolphin-knife/trend)
## **Top dolphin knife search terms**
- **dolphin knife**50K/yr-16.8%5.0% conv. - **delphine knife**19K/yr-5.2%4.2% conv. - **delphin knife**10K/yr-52.9%3.3% conv. - **carpet knives**6K/yr-2.4%1.1% conv. - **artificial grass cutting knife**3K/yr+77.6%2.4% conv. - **flooring knife**5K/yr+2.8%3.0% conv. [**All search terms **](https://flapen.com/research/uk/diy-tools/dolphin-knife/search-terms)
## **Top dolphin knife 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%4%£2K8%£5K12%£7K16%£9K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)1 product missing review or click data not plotted
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**TradeUnderlay Orange Carpet Fitter Knife with Orange Holster**CCA**£10.87**4.4★204 rev](https://www.amazon.co.uk/dp/B08VGY9Z3H) [2**TradeUnderlay Silver Knife Carpet Fitter Economy Tool with Holster**CCA**£10.85**4.7★22 rev](https://www.amazon.co.uk/dp/B0DJGWHDQV) [3**Delphin Yellow dolphin Knife Carpet Fitter Professional Tool**Dolphin**£15.55**4.6★604 rev](https://www.amazon.co.uk/dp/B07Q44YYD1) [4**CCA Black Carpet Cutter Tool with Black Holder for Pro and DIY Installers**CCA**£10.88**4.7★51 rev](https://www.amazon.co.uk/dp/B0DJ1F1QK6) [5**Dolphin Dolphin Knife Carpet Cutter Professional Tool with Holster White**TradeUnderlay**£15.51**4.8★429 rev](https://www.amazon.co.uk/dp/B07Q36KJNM)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Dekton Carpet Knife Heavy Duty Razor Blade Utility Knife for Cutting Carpets Vinyl and Flooring Materials | Ergonomic Soft-Grip Handle | Quick Blade Change | Ideal for DIY and Professional Use**DEKTON**£6.16**65 rev1y ago](https://www.amazon.co.uk/dp/B0F5QHYN53) [**Barnwell Silver Carpet Stingray Fixed Handle Work Tool ONLY with Belt/Pocket Holster**Barnwell**£10.25**15 rev1y ago](https://www.amazon.co.uk/dp/B0DTTX7PB5) [**Barnwell Pink Carpet Stingray Fixed Handle Work Tool ONLY with Belt/Pocket Holster**Barnwell**£9.43**15 rev1y ago](https://www.amazon.co.uk/dp/B0DTTXR6QB) [**Barnwell Green Carpet Stingray Fixed Handle Work Tool ONLY with Belt/Pocket Holster**Barnwell**£10.13**12 rev1y ago](https://www.amazon.co.uk/dp/B0DTTXCL2V) [**Dolphin Carpet Cutting Handle Carpet Fitter Work Trimming Knife with Holster Candy Violet - No Blades PTL**PTL**£22.08**3 rev1y ago](https://www.amazon.co.uk/dp/B0DJRZX1XN)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Shark-Tuff Heavy Duty Folding Utility Knife with 10 Spare SK5 Blades | All Metal Sharp Craft Tradesman Camping Pocket Knife Cardboard Box Cutter with Belt Clip & Safety Lock UK Legal**Homebay**£4.98**4.5★**▲ 116%**](https://www.amazon.co.uk/dp/B0CW3FC5XR) [**TradeUnderlay Black Carpet Fitter Knife with Holster**CCA**£10.91**4.5★**▲ 81%**](https://www.amazon.co.uk/dp/B08V9FZKFS) [**CCA White Carpet Cutter Tool with White Holder for Pro and DIY Installers**CCA**£9.24**4.4★**▲ 69%**](https://www.amazon.co.uk/dp/B0DJ1FNV3P) [**Dolphin Carpet Cutting Handle Carpet Fitter Work Trimming Knife with Holster Candy Violet - No Blades PTL**PTL**£22.08**4.6★**▲ 47%**](https://www.amazon.co.uk/dp/B0DJRZX1XN) [**TradeUnderlay Orange Carpet Fitter Knife with Orange Holster**CCA**£10.87**4.4★**▲ 46%**](https://www.amazon.co.uk/dp/B08VGY9Z3H)
**~~View all trending →~~**
## **What buyers say about dolphin knife**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**30%
*“Excellent product”*
**Value For Money**19%
*“Reasonable price”*
**Ease Of Use**10%
*“Easy to use”*
**Advertised Vs Actual Product**6%
*“Does the job”*
**Grip**6%
*“easy to grip comes with extra blades”*
**Strength**5%
*“a solid bit of kit which i think will last for a long time”*
**Design-Overall**4%
*“the design is comfortable”*
**Durability**3%
*“Great price very durable”*
**Comfort-Overall**2%
*“They are comfortable to use and feel sturdy”*
**Compactness**2%
*“Nice little knife very compact”*
### **What buyers complain about **
**Durability**25%
*“One broke on the first day”*
**Quality-Overall**24%
*“Inferior quality, fell apart after a couple of weeks”*
**Size-Overall**15%
*“knife is a sloppy fit”*
**Ease Of Use**6%
*“Quite difficult to open and close”*
**Weight Heavy**4%
*“Not so heavy duty”*
**Leak-Proof**3%
*“the contents spilled in to the tool box”*
**Design-Overall**3%
*“Poor design”*
**Hard Feel**3%
*“Very hard to get blade out”*
**Natural Resource Wastage**2%
*“Waste of money”*
**Grip**1%
*“stiff for me to use due to issues with my hand”*
### **Top return reasons **
**Quality-Overall**20%
**Functionality-Overall**18%
**Size-Overall**10%
**Mechanism Issues**6%
**Strength**6%
**Durability**6%
**Defective Material/Parts**5%
**Ease Of Use**4%
**Add-Ons/Attachments**4%
**Jamming/Clogging**4%
## **Common questions**
- **Is dolphin knife profitable to sell on Amazon United Kingdom?**
- The niche generates £59K/yr across 29 tracked products. 90-day search growth is -15.8%. Flapen's verdict: Skip it (46/100).
- **How competitive is the dolphin knife niche?**
- 11 brands and 13 sellers compete. The top 5 products take 41% of clicks and top 5 brands hold 94% of demand.
- **What do buyers complain about in dolphin knife?**
- Top complaints mined from reviews: Durability, Quality-Overall, Size-Overall. The return rate is 0.8%.
- **When does demand for dolphin knife peak?**
- Demand peaks in Sep; the busiest month runs 2.0× the quietest.
- **What does it cost to enter the dolphin knife niche?**
- Listings span £4.36–£25.61; the average listing price is £12.25 (sweet spot $15–$100). The average incumbent carries 274 reviews — the moat a new listing must climb.
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