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Knife Sharpeners

Knife Sharpeners shows low returns (0.6%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Flapen Score

59
Worth a look

Top 20% of 5,777 Home & Garden niches · +8 vs the category median of 51

Market size 93Growth 16Conversion 75Competition 25Returns 97Price range 76Avg price 78Brand share 64Review moat 18Quality gap 72
This niche Category average · 5,777 niches

Is Knife Sharpeners profitable on Amazon?

According to Flapen's Amazon United Kingdom niche tracking, Knife Sharpeners is a £1.9M/yr Amazon United Kingdom market (1.7M searches/yr). The top 5 brands hold 67% of demand. Demand peaks in Jan–Nov–Dec. Verdict: Worth a look — 59/100.

Knife Sharpeners: the Amazon niche in one read

Everything a seller checks before entering, in three answers.

Is the demand real?

Worth a look. Search demand moved -18.3% over the last 90 days and 6.9% of searches end in a purchase.

£1.9M

revenue / yr

Units sold / yr125K
Search volume / yr-18.3%1.7M
Conversion rate6.9%
Avg price£16.12

Who owns the niche?

The top 5 brands hold 67% of demand, so 33% of the market is open.

33%

open market share

Brands · sellers16 · 59
Top-5 product click share70%
Open market33%
Avg brand age57 months

Is there a way in?

Listing quality. The average product page scores 0/100 on content standards. Incumbents average 4.3★ — the gap to enter on.

0/100

page quality · 22 products

Sponsored placement91%
New entrants (1y)5· 3 succeeded
Avg rating4.3★
Avg reviews17,514

Top Knife Sharpeners products & what they sell for

Every tracked product — its share of the shelf, its review moat, and what it sells for.

Competition: brands, sellers & click share

The top 5 products capture 70% of clicks — a locked-up shelf that new listings rarely crack.

£0£94K£188K£282K£377K101001K10K100K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

16 rising

Sellers

59

Top-5 brand share

67%

Top 20: 85%

Top-5 click share

70%

Top 20: 98%

Open market

19%

  • AnySharp38%
  • --15%
  • Lantana13%
  • Pietuley8%
  • vigvitfur4%
  • longzon3%

Knife Sharpeners demand & seasonality

Weekly search volume, with the niche's key stats alongside.

Volume1.7MCVR6.9%Products22Brands16Top 5 Brands67%OOS Rate0.0%Rating4.3★Reviews17,514Avg BSR#76
60K40KSpike '24Holiday '24Prime Day '25Spike '25Black Friday '25Holiday '25SepDecMarJunAugNovMarMay

Peak months: Jan, Nov, Dec · busiest ÷ quietest = 2.6×

Top Knife Sharpeners search terms shoppers use

The exact queries shoppers type, with yearly volume, growth and conversion.

  • knife sharpener1.3M/yr
  • knife sharpener uk127K/yr
  • knife sharpeners51K/yr
  • kitchen knife sharpener39K/yr
  • knife sharpening14K/yr
  • manual knife sharpeners15K/yr
  • knives sharpener13K/yr
  • knife-sharpener17K/yr
  • diamond knife sharpener12K/yr
  • professional knife sharpener11K/yr

What reviews say buyers love and hate about Knife Sharpeners

What buyers mention most, as a share of all reviews.

What buyers love

85% of reviews
Sharpness31%

gets knives very sharp

Ease Of Use15%

Easy to Find and Use

Quality-Overall13%

Excellent product

Value For Money9%

Good value

Advertised Vs Actual Product7%

it actually works as advertised

What buyers complain about

78% of reviews
Sharpness25%

the any sharp is very small

Quality-Overall12%

My knives are not of fantastic quality

Durability9%

dont last

Functionality-Overall8%

Barely effective

Size-Overall8%

Not fit for purpose

Knife Sharpeners return rate & reasons

Why buyers send it back, as a share of all return requests.

0.6%

Return rate

12%

Fixable by listing

The "fixable" share counts expectation-mismatch reasons — size, look, advertised-vs-actual — that better copy and images address.

1Sharpness
39%
2Functionality-Overall
19%
3Size-Overall
7%
4Quality-Overall
7%
5Adhesion/Stickiness
4%

Common Knife Sharpeners questions

The questions sellers ask about this niche, answered from the tracked metrics.

Flapen scores Knife Sharpeners 59/100 on Amazon United Kingdom — Worth a look. The niche generates £1.9M/yr across 22 tracked products. 3 of 5 products launched in the last 360 days are still selling. Search demand moved -18.3% over the last 90 days.
Search demand for Knife Sharpeners on Amazon United Kingdom peaks in Jan–Nov–Dec, where the busiest month runs 2.6× the quietest.