---
title: "Whetstone — £388K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/diy-tools/whetstone"
last_updated: "2026-07-31T07:58:07.539Z"
locale: en
meta:
description: "Niche score 54/100 · £388K/yr market · 373K searches/yr · £16.92 avg price. Soft demand (-16.1% this quarter) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 54/100 · £388K/yr market · 373K searches/yr · £16.92 avg price. Soft demand (-16.1% this quarter) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Whetstone — £388K/yr Amazon UK Niche (2026) - Flapen"
---
# **whetstone**
**Worth a look**
Shows low returns (0.6%), but soft demand (-16.1% this quarter) keeps it on the watch list.
Market size 55Growth 17Conversion 68Competition 53Returns 97Price range 74Avg price 80Brand share 53Review moat 35Quality gap 42
**Returns**
**Incredible****0.6%**
return rate — above 5% kills the launch gate
**Avg price**
**Great****£16.92**
avg listing price — sweet spot $15–$100
**Price range**
**Good****£3.32–£48.12**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Conversion**
**Good****6.1%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Good****£388K**
£388K/yr · 373K searches
**Competition**
**Good****53%**
top-5 click share — leaders hold, buyers still browse
**Brand share**
**Good****73%**
top-5 brand share — brands hold most of the demand
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Okay****3,042.82**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Bad****-16.1%**
90-day search growth — must beat 0% to launch
According to Flapen's Amazon United Kingdom niche tracking, whetstone is a £388K/yr Amazon United Kingdom market (373K searches/yr). The top 5 brands hold 73% of demand. Demand peaks in Dec. Verdict: Worth a look — 54/100.
Data updated Jul 22, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **whetstone market data**
- **Units sold / yr**
- **20K–25K**
- avg 750–1,000/product
- **Revenue / yr**
- **£338K–£423K**
- units × avg price
- **Conversion rate**
- **6.1%**
- **Avg BSR**
- **#18**
- **Page quality**
- **0%**
- **Prime**
- **95%**
- **Sponsored**
- **86%**
- **Out of stock**
- **2.4%**
- **Avg brand age**
- **60 months**
- **Avg seller age**
- **179 days**
## **Competition & brand share**
The top 5 products take 53% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**18 **▼falling
**Sellers**
**25**
**Top-5 brand share**
**73%**
Top 20: 100%
**Top-5 click share**
**53%**
Top 20: 99%
**Open market**
**22%**
- KEENBEST26% - wucgea22% - S SATC10% - BGS Do it yourself9% - SHAN ZU8% - vuwo5%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -16.1% search growth over the last 90 days.
13K8KSpike '24Holiday '24Prime Day '25Black Friday '25Holiday '25 seasonSepDecMarJunAugNovMarMay
Peak months: Dec · busiest ÷ quietest = 2.0×
[**Open Trend **](https://flapen.com/research/uk/diy-tools/whetstone/trend)
## **Top whetstone search terms**
- **sharpening stone**93K/yr-15.9%5.2% conv. - **whetstone**76K/yr-4.3%6.3% conv. - **knife sharpener stone**32K/yr-7.9%6.1% conv. - **whetstone knife sharpener**32K/yr-29.4%6.8% conv. - **wet stone knife sharpener**21K/yr-20.4%7.0% conv. - **knife sharpening stone**21K/yr-15.9%5.6% conv. - **sharpening stones**14K/yr-2.0%2.3% conv. - **sharpening stones for knives**16K/yr-20.8%5.0% conv. - **wet stone**11K/yr-5.8%5.4% conv. - **waterstones**13K/yr-18.9%0.1% conv. [**All search terms **](https://flapen.com/research/uk/diy-tools/whetstone/search-terms)
## **Top whetstone 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%£16K8%£31K12%£47K16%£62K1101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 22 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**KEENBEST Actual Grit Premium Material Sharpening Stone Set 400 1000 3000 8000 Whetstone Japanese Knife Sharpener Stone Wetstones for Sharpening Knives Wet Stone Red**KEENBEST**£17.58**4.6★3,524 rev](https://www.amazon.co.uk/dp/B09FL3LY51) [2**Knife Sharpening Stone Kit - 1000/6000 Grit Japanese Whetstone Sharpener Set with Non-Slip Rubber Base Angle Guide Flattening Stone for Kitchen Knives Chisel Axe Scissors**wucgea**£10.16**4.5★4,592 rev](https://www.amazon.co.uk/dp/B0BBFD7M1Y) [3**SATC Sharpening Stones for Kitchen Knives 400 1000 3000 8000 Grit Whetstone Knife Sharpener with Non-Slip Wood Base Flattening Stone Angle Guide and Leather Strop**S SATC**£15.24**4.4★1,666 rev](https://www.amazon.co.uk/dp/B0CBTX86WW) [4**BGS Diy 8062 | Sharpening Stone | K 120/K 240**BGS Do it yourself**£3.32**4.6★362 rev](https://www.amazon.co.uk/dp/B001ILCEC2) [5**SHAN ZU Sharpening Stone Whetstone with Angle Guide Non-Slip Bamboo Base grit 1000/6000 Knife Sharpeners Professional 2-in-1 Wetstone**SHAN ZU**£16.95**4.6★15,661 rev](https://www.amazon.co.uk/dp/B077K36682)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Dayacoco Knife Sharpening Stone Kit Premium 400 1000 3000 8000 Whetstone Knife Sharpener with Non-Slip Wood Base Angle Guide Flattening Stone Leather Strop for Sharpening Knives (8 Pcs)**Dayacoco**£12.18**10 rev6mo ago](https://www.amazon.co.uk/dp/B0GDXV1743) [**vuwo Knife Sharpening Stone Kit- Professional Knife Sharpener Dual Sided 400&1000 Grit Wet Stone Set with Non-Slip Rubber Base Whetstone for Kitchen**vuwo**£6.87**1,121 rev1y ago](https://www.amazon.co.uk/dp/B0DZX933Q7) [**HEZHEN Double-Side Whetstone Extra Large Corundum Sharpening Stone Kit Professional Knife Sharpener Set 1000/5000 Grit with Non-Slip Acacia Wood Base/Flattening Stone/Angle Guide**HEZHEN**£48.12**3 rev1y ago](https://www.amazon.co.uk/dp/B0DNLXRSSS) [**RISEMART Knife Sharpening Stones Set Professional 400 1000 3000 8000 Grit Whetstone for Sharpening Knives with Flattening Stone Non-Slip Base Angle Guide (8 Pcs)**RISEMART**£13.65**325 rev2y ago](https://www.amazon.co.uk/dp/B0CC4T8Q1M) [**SATC Sharpening Stones for Kitchen Knives 400 1000 3000 8000 Grit Whetstone Knife Sharpener with Non-Slip Wood Base Flattening Stone Angle Guide and Leather Strop**S SATC**£15.24**1,666 rev2y ago](https://www.amazon.co.uk/dp/B0CBTX86WW)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Dayacoco Knife Sharpening Stone Kit Premium 400 1000 3000 8000 Whetstone Knife Sharpener with Non-Slip Wood Base Angle Guide Flattening Stone Leather Strop for Sharpening Knives (8 Pcs)**Dayacoco**£12.18**5.0★**▲ 342%**](https://www.amazon.co.uk/dp/B0GDXV1743) [**BGS Diy 8062 | Sharpening Stone | K 120/K 240**BGS Do it yourself**£3.32**4.6★**▲ 120%**](https://www.amazon.co.uk/dp/B001ILCEC2) [**HEZHEN Double-Side Whetstone Extra Large Corundum Sharpening Stone Kit Professional Knife Sharpener Set 1000/5000 Grit with Non-Slip Acacia Wood Base/Flattening Stone/Angle Guide**HEZHEN**£48.12**4.6★**▲ 95%**](https://www.amazon.co.uk/dp/B0DNLXRSSS) [**IHIGOGOFA Sharpening Stone 230 mm (9) 180 Grit Oval Whetstone for Sharpening Knives Knife Sharpener Stone for Garden Tools Kitchen Knives Chisels Axes**IHIGOGOFA**£5.98**4.2★**▲ 82%**](https://www.amazon.co.uk/dp/B09TFP72LJ) [**Knife Sharpening Stone Kit - 1000/6000 Grit Japanese Whetstone Sharpener Set with Non-Slip Rubber Base Angle Guide Flattening Stone for Kitchen Knives Chisel Axe Scissors**wucgea**£10.16**4.5★**▲ 74%**](https://www.amazon.co.uk/dp/B0BBFD7M1Y)
**~~View all trending →~~**
## **What buyers say about whetstone**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**22%
*“Excellent product”*
**Sharpness**18%
*“Very handy item that helps with sharp knives”*
**Value For Money**18%
*“Good value for money”*
**Advertised Vs Actual Product**13%
*“Does the job”*
**Ease Of Use**11%
*“Easy to use”*
**Product Condition**3%
*“Like new”*
**Instructions/User Manual/Troubleshooting**2%
*“instructions in the set”*
**Efficiency**2%
*“it does the job efficiently”*
**Size-Overall**2%
*“The size is also convenient”*
**Design-Overall**1%
*“aesthetically pleasing product that works well”*
### **What buyers complain about **
**Quality-Overall**17%
*“low quality”*
**Size-Overall**15%
*“Not fit for purpose”*
**Sharpness**10%
*“Simply does NOT sharpen at all”*
**Advertised Vs Actual Product**8%
*“The product dimensions are misleading”*
**Material Quality**6%
*“more expensive 6000 grit stone which does not shed material”*
**Ease Of Use**5%
*“found this a bit too fiddly to use”*
**Durability**5%
*“Lasted longer”*
**Instructions/User Manual/Troubleshooting**4%
*“instructions could have been better”*
**Ease Of Cleaning**4%
*“Bit messy and takes bit of time and prectice”*
**Value For Money**2%
*“poor value for money”*
### **Top return reasons **
**Functionality-Overall**20%
**Sharpness**17%
**Quality-Overall**9%
**Size-Overall**9%
**Advertised Vs Actual Product**7%
**Durability**5%
**Defective Material/Parts**5%
**Product Condition**4%
**Gifting Purpose**4%
**Value For Money**4%
## **Common questions**
- **Is whetstone profitable to sell on Amazon United Kingdom?**
- The niche generates £388K/yr across 22 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -16.1%. Flapen's verdict: Worth a look (54/100).
- **How competitive is the whetstone niche?**
- 18 brands and 25 sellers compete. The top 5 products take 53% of clicks and top 5 brands hold 73% of demand.
- **What do buyers complain about in whetstone?**
- Top complaints mined from reviews: Quality-Overall, Size-Overall, Sharpness. The return rate is 0.6%.
- **When does demand for whetstone peak?**
- Demand peaks in Dec; the busiest month runs 2.0× the quietest.
- **What does it cost to enter the whetstone niche?**
- Listings span £3.32–£48.12; the average listing price is £16.92 (sweet spot $15–$100). The average incumbent carries 3,043 reviews — the moat a new listing must climb.
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