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Diamond Knife Sharpener

Maybe

Returns run at only 0.6% of orders. But shoppers spend only $55K a year here, so Diamond Knife Sharpener is a Maybe.

Flapen Score
50
50 / 100
Ranks 2,970 of 5,777 Home & Garden niches · −1 vs the category median of 51
Market size
£55K/yr21K searches / yr
90-day growth
-19.6%search demand this quarter
Competition
71%top-5 click share · 12 brands · 26 sellers

Flapen Score

Diamond Knife Sharpener against its category

The dotted line is the Home & Garden average. Past it, Diamond Knife Sharpener is stronger. Inside it, weaker.

50Maybe
Big MarketTrendingHigh ConversionOpen MarketLow ReturnsPrice rangeAvg priceNo Dominant BrandLow Review BarrierQuality Gap
This niche Category average

Market

The Diamond Knife Sharpener market on Amazon at a glance

Shoppers on Amazon United Kingdom searched for Diamond Knife Sharpener 21K times last year and spent an estimated £55K. The top 5 brands take 80% of clicks. Demand peaks in Sep–Oct–Nov–Dec. Flapen scores it 50 out of 100, a Maybe.

01 · Demand

12.7% of searches ended in a purchase last week.

Shoppers searched for this 21K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. In the latest week, 12.7% of those searches ended in a purchase. Searches in the last 90 days moved -19.6% against the 90 days before. Searches, conversion and average price together put the market at an estimated £55K a year.

Searches, last 12 months
21K
Growth, 90 days vs prior 90
-19.6%
Conversion, latest week
12.7%
Market size, estimated
£55Ka year
Peak month
December4.6× the quietest month
Top search term
diamond steel knife sharpener9K searches a year

02 · Price

A sale here is worth £20.98.

Listings sell for £20.98 on average, from £10.66 to £53.44. Amazon reports units sold in ranges. This niche sold 2K to 2K a year. The average listing sells 100 to 250 of them. At £20.98 that is £2K to £5K a year per listing.

Average price
£20.98inside the $15 to $100 sweet spot
Price range
£10.66–£53.44
Amazon United Kingdom median price
£12.12across 27,606 niches
Units sold a year
2K–2K
Units per listing a year
100–250
Revenue per listing a year
£2K–£5K
Returns
0.6%of orders · Amazon United Kingdom median 0.6%

03 · Entry bar

The bar here is low.

71% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 1.8% of listings are out of stock. The average listing ranks #49 within Knife Sharpeners. It carries 614 reviews at 4.38 stars, so a new listing needs social proof before a better product.

Sponsored listings
71%
Prime listings
100%
Out of stock, average day
1.8%
Average rank
#49in Knife Sharpeners
Average rating
4.38 starsAmazon United Kingdom average 4.36 stars
Average reviews
614per listing
Listings tracked
14

04 · Newcomers

Amazon counts 0 of last year's 1 launches as successful.

1 products launched here in the last 12 months. Amazon counts 0 of them as successful launches, new products that hit its first-year sales bar. The brands on the shelf have sold for 58 months on average, so the names here are settling in.

Launched, last 12 months
1
Successful launches
0Amazon's first-year sales bar
Average brand age
58 months

Products

Top Diamond Knife Sharpener products & what they sell for

Every tracked product: its share of the shelf, its reviews, and its price.

Competition

Competition: brands, sellers & click share

The top 5 products take 71% of clicks. A locked shelf that new listings rarely crack.

£0£6K£11K£17K£22K1101001K10K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

12 falling

Sellers

26

Top-5 brand share

80%

Top 20: 100%

Top-5 click share

71%

Top 20: 100%

Open market

15%

  • W WITHLENT30%
  • Vogue25%
  • Kimura10%
  • Navaris10%
  • Victorinox5%
  • Harnovlis5%
  • Open — no brand owns it (6 brands, 15%)

Demand

Diamond Knife Sharpener search demand

Weekly searches over the year, seasonality beneath. Pick a range.

3K2KHoliday '24Spike '25Prime Day '25Holiday '25Spike '26SepDecMarJunAugNovMarMay

Peak months: Sep, Oct, Nov, Dec · busiest ÷ quietest = 4.6×

Search terms

Top Diamond Knife Sharpener search terms shoppers use

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

  • diamond steel knife sharpener9K/yr
  • diamond steel6K/yr
  • diamond sharpening steel6K/yr

Reviews and returns

What reviews say buyers love and hate about Diamond Knife Sharpener

What buyers praise, what they complain about and why they send it back, from the reviews.

Complain

Durability33%−0.32

Not for professional use doesn't last long enough

Sadly the diamond surface very quickly became worn and ineffective

sadly worn in no time

Quality-Overall19%+1.86

it's a truly garbage product

junk products

victorinox has lost its quality now

Rusts/Corrodes14%+0.33

Our previous one of 42 years got rusty

Value For Money14%+0.48

Complete waste of money

Handle Quality7%+0.23

Rather plasticky handle

Love

Sharpness30%+0.19

Keep things sharp

they stay sharp

Sharp

Quality-Overall25%+1.86

Good quality

Great quality and easy to store

Build Quality: It feels incredibly sturdy

Value For Money14%+0.48

Great deal

Excellent value for money

very well worth the money

Ease Of Use6%−0.10

Easy to use

making it much easier to maintain a consistent angle as you swipe

Having both options in one tool makes it incredibly convenient

Advertised Vs Actual Product3%+0.44

As advertised

works as intended

Return

0.6% Return rate 22% Fixable by listing

Quality-Overall18%▁█▁▆▁▁

it's a truly garbage product

junk products

victorinox has lost its quality now

Advertised Vs Actual Product16%▂▁█▁▁▁
Functionality-Overall14%█▁▁█▁▁
Sharpness12%▂▁▁▁█▅
Gifting Purpose8%▁▇█▁▁▁

FAQ

Common Diamond Knife Sharpener questions

Answered from the same tracked data.