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Small Kilner Jars

a small market ($39K/yr) — Small Kilner Jars doesn't clear our bar today.

Flapen Score

36
Skip it
Market size 10Growth 14Conversion 84Competition 30Returns 97Price range 25Avg price 28Brand share 10Review moat 47Quality gap 37
This niche Category average

Is Small Kilner Jars profitable on Amazon?

According to Flapen's Amazon United Kingdom niche tracking, Small Kilner Jars is a £39K/yr Amazon United Kingdom market (46K searches/yr). The top 5 brands hold 96% of demand. Verdict: Skip it — 36/100.

Small Kilner Jars: the Amazon niche in one read

Everything a seller checks before entering, in three answers.

Is the demand real?

Not really. Search demand moved -21.2% over the last 90 days and 9.1% of searches end in a purchase.

£39K

revenue / yr

Units sold / yr6K
Search volume / yr-21.2%46K
Conversion rate9.1%
Avg price£9.32

Who owns the niche?

The top 5 brands hold 96% of demand, so 4% of the market is open.

4%

open market share

Brands · sellers7 · 50
Top-5 product click share67%
Open market4%
Avg brand age42 months

Is there a way in?

Listing quality. The average product page scores 0/100 on content standards. Incumbents average 4.5★ — the gap to enter on.

0/100

page quality · 19 products

Sponsored placement37%
New entrants (1y)1· 0 succeeded
Avg rating4.5★
Avg reviews1,795

Top Small Kilner Jars 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 take 67% of clicks — established leaders, but buyers still shop beyond them.

£0£4K£8K£12K£16K101001K10K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

7 falling

Sellers

50

Top-5 brand share

96%

Top 20: 100%

Top-5 click share

67%

Top 20: 100%

Open market

2%

  • Kilner79%
  • OS Oak & Steel ENGLAND6%
  • Argon Tableware6%
  • Chef-hub3%
  • Vogue2%
  • HEFTMAN2%
  • Open — no brand owns it (1 brand, 2%)

Small Kilner Jars demand & seasonality

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

Volume46KCVR9.1%Products19Brands7Top 5 Brands96%OOS Rate0.0%Rating4.5★Reviews1,795Avg BSR#442
1K750Holiday '25Sep '25Nov '25Jan '26Feb '26Apr '26May '26

Top Small Kilner Jars search terms shoppers use

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

  • small kilner jars15K/yr
  • small kilner jars with clip lids11K/yr
  • kilner jars 250ml9K/yr
  • 250ml kilner jars4K/yr
  • mini kilner jars3K/yr
  • kilner jars small3K/yr

What reviews say buyers love and hate about Small Kilner Jars

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

What buyers love

90% of reviews
Quality-Overall25%

Good quality jar

Value For Money18%

Good price

Size-Overall17%

Good size for my needs

Advertised Vs Actual Product7%

Does the job - good value for money

Storage Capacity7%

Good storage

What buyers complain about

80% of reviews
Size-Overall19%

Dimensions insufficient and misleading

Quality-Overall15%

Not great quality glass

Durability13%

Broke after 2 uses

Smell8%

I was led to believe these were smell proof, they are not

Advertised Vs Actual Product6%

The dimensions provided don't give enough information and are misleading

Small Kilner Jars return rate & reasons

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

0.7%

Return rate

82%

Fixable by listing

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

1Size-Overall
72%
2Defective Material/Parts
8%
3Advertised Vs Actual Product
4%
4Quality-Overall
2%
5Functionality-Overall
2%

Common Small Kilner Jars questions

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

Flapen scores Small Kilner Jars 36/100 on Amazon United Kingdom — Skip it. The niche generates £39K/yr across 19 tracked products. 0 of 1 products launched in the last 360 days are still selling. Search demand moved -21.2% over the last 90 days.
Small Kilner Jars buyers on Amazon United Kingdom complain most about Size-Overall, Quality-Overall, Durability, the themes mined from the niche's reviews. Its return rate is 0.7%.