---
title: "Small Kilner Jars — £39K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/business-industry-science/small-kilner-jars"
last_updated: "2026-07-31T14:51:01.433Z"
locale: en
meta:
description: "Niche score 36/100 · £39K/yr market · 46K searches/yr · £9.32 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 36/100 · £39K/yr market · 46K searches/yr · £9.32 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Small Kilner Jars — £39K/yr Amazon UK Niche (2026) - Flapen"
---
# **small kilner jars**
**Skip it**
A small market ($39K/yr) — this niche doesn't clear our bar today.
Market size 10Growth 14Conversion 84Competition 30Returns 97Price range 25Avg price 28Brand share 10Review moat 47Quality gap 37
**Returns**
**Incredible****0.7%**
return rate — above 5% kills the launch gate
**Conversion**
**Great****9.1%**
search→purchase rate — share of searches ending in a sale
**Review moat**
**Okay****1,794.79**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Competition**
**Okay****67%**
top-5 click share — leaders hold, buyers still browse
**Avg price**
**Okay****£9.32**
avg listing price — sweet spot $15–$100
**Price range**
**Okay****£1.43–£19.52**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Growth**
**Bad****-21.2%**
90-day search growth — must beat 0% to launch
**Market size**
**Bad****£39K**
£39K/yr · 46K searches
**Brand share**
**Bad****96%**
top-5 brand share — brand-locked demand
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.
Data updated Jul 21, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **small kilner jars market data**
- **Units sold / yr**
- **5K–6K**
- avg 100–250/product
- **Revenue / yr**
- **£47K–£56K**
- units × avg price
- **Conversion rate**
- **9.1%**
- **Avg BSR**
- **#442**
- **Page quality**
- **0%**
- **Prime**
- **63%**
- **Sponsored**
- **37%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **42 months**
- **Avg seller age**
- **188 days**
## **Competition & brand share**
The top 5 products take 67% of clicks — established leaders, but buyers still shop beyond them.
**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%)
## **Demand**
Weekly Amazon search volume, last 42 weeks — -21.2% search growth over the last 90 days.
1K750Holiday '25Sep '25Nov '25Jan '26Feb '26Apr '26May '26
[**Open Trend **](https://flapen.com/research/uk/business-industry-science/small-kilner-jars/trend)
## **Top small kilner jars search terms**
- **small kilner jars**15K/yr-29.5%7.9% conv. - **small kilner jars with clip lids**11K/yr-14.2%9.2% conv. - **kilner jars 250ml**9K/yr-10.6%6.4% conv. - **250ml kilner jars**4K/yr-29.5%8.6% conv. - **mini kilner jars**3K/yr-20.3%6.6% conv. - **kilner jars small**3K/yr-10.2%9.0% conv. [**All search terms **](https://flapen.com/research/uk/business-industry-science/small-kilner-jars/search-terms)
## **Top small kilner jars 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%10%£4K20%£8K30%£12K40%£16K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 19 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Kilner Square Clip Top Jar 250ml (0.25L) Airtight Glass Jar for Storing Herbs Spices Dried Fruits Nuts and Seeds**Kilner**£4.57**4.4★76 rev](https://www.amazon.co.uk/dp/B0C6KWR532) [2**Kilner Round Clip Top Jar 0.125 Litre (125ml) Airtight Glass Storage Jar for Preserving Spices Dry Foods Reusable**Kilner**£2.19**4.6★831 rev](https://www.amazon.co.uk/dp/B005PA3I8G) [3**Kilner Square Clip Top Spice Jar - 70ml**Kilner**£1.43**4.5★967 rev](https://www.amazon.co.uk/dp/B007MO0IYA) [4**Kilner Set of 3 Round Clip Top Jars 0.5 Litre (3 x 500ml) Airtight Glass Storage Jars for Preserving Jams Dry Foods Reusable**Kilner**£10.41**4.7★814 rev](https://www.amazon.co.uk/dp/B096G8BQYL) [5**Oak & Steel - 12 Mini Clip Top Glass Spice Storage Jars - 100 ml Glass Canister Containers with Lids 24 Labels and Chalk Pen (8 x 5cm) - Perfect for Spice Storage Jam Honey Gifting**OS Oak & Steel ENGLAND**£12.54**4.4★2,033 rev](https://www.amazon.co.uk/dp/B08SMNDX5Z)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**HEFTMAN Clip Top Glass Jars - Set of 6 250ml Airtight Glass Jars with Lids and Silicone Seal for Pasta Sourdough Starter Chutney Pickling Kitchen Organisation - Empty Food Storage Jar Set (6 Pack)**HEFTMAN**£12.25**158 rev5mo ago](https://www.amazon.co.uk/dp/B0GPFS4ZGJ) [**Kilner Square Clip Top Jar 250ml (0.25L) Airtight Glass Jar for Storing Herbs Spices Dried Fruits Nuts and Seeds**Kilner**£4.57**76 rev2y ago](https://www.amazon.co.uk/dp/B0C6KWR532) [**Kilner Wide Mouth Preserve Jar 0.2L (200ml) Glass Storage Jar with Vacuum Seal Ideal for Preserving Small Fruits and Vegetables**Kilner**£2.20**154 rev4y ago](https://www.amazon.co.uk/dp/B0B15JL8P5) [**Kilner Preserve Jar - 250ml (Pack 6)**Kilner**£13.10**147 rev4y ago](https://www.amazon.co.uk/dp/B09J3NT7G5) [**Kilner Set of 3 Round Clip Top Jars 0.5 Litre (3 x 500ml) Airtight Glass Storage Jars for Preserving Jams Dry Foods Reusable**Kilner**£10.41**814 rev5y ago](https://www.amazon.co.uk/dp/B096G8BQYL)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**HEFTMAN Clip Top Glass Jars - Set of 6 250ml Airtight Glass Jars with Lids and Silicone Seal for Pasta Sourdough Starter Chutney Pickling Kitchen Organisation - Empty Food Storage Jar Set (6 Pack)**HEFTMAN**£12.25**4.7★**▲ 189%**](https://www.amazon.co.uk/dp/B0GPFS4ZGJ) [**Argon Tableware Glass Jars with Airtight Metal Clip Lid - 500ml/17.6oz - 3 Pack - 4 Colour Seals - Medium Kitchen Storage Container Round Preserving Jar for Pickling Chutney Jam Coffee**Argon Tableware**£8.92**4.5★**▲ 69%**](https://www.amazon.co.uk/dp/B0117P4VBA) [**Kilner Square Clip Top Jar 250ml (0.25L) Airtight Glass Jar for Storing Herbs Spices Dried Fruits Nuts and Seeds**Kilner**£4.57**4.4★**▲ 60%**](https://www.amazon.co.uk/dp/B0C6KWR532) [**Kilner Snack and Store Pots Set of 2 Glass Jars with Leak-Proof Silicone Lids 0.125 Litre Each Perfect for Seeds Nuts Fruit Veggies and Snacks**Kilner**£6.12**4.7★**▲ 48%**](https://www.amazon.co.uk/dp/B08L46YDDK) [**Kilner Wide Mouth Preserve Jar 0.2L (200ml) Glass Storage Jar with Vacuum Seal Ideal for Preserving Small Fruits and Vegetables**Kilner**£2.20**4.5★**▲ 36%**](https://www.amazon.co.uk/dp/B0B15JL8P5)
**~~View all trending →~~**
## **What buyers say about small kilner jars**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**25%
*“Good quality jar”*
**Value For Money**18%
*“Good price”*
**Size-Overall**17%
*“Good size for my needs”*
**Advertised Vs Actual Product**7%
*“Does the job - good value for money”*
**Storage Capacity**7%
*“Good storage”*
**Ease Of Cleaning**5%
*“Easy to clean”*
**Ease Of Use**3%
*“Useful”*
**Durability**3%
*“All durable”*
**Strength**2%
*“Nice size looks sturdy”*
**Color**1%
*“Perfect for green”*
### **What buyers complain about **
**Size-Overall**19%
*“Dimensions insufficient and misleading”*
**Quality-Overall**15%
*“Not great quality glass”*
**Durability**13%
*“Broke after 2 uses”*
**Smell**8%
*“I was led to believe these were smell proof, they are not”*
**Advertised Vs Actual Product**6%
*“The dimensions provided don't give enough information and are misleading”*
**Ease Of Use**6%
*“making it completely impossible for a toddler to confidently open or close the jar without the whole thing falling apart”*
**Value For Money**5%
*“Not worth the RRP”*
**Jamming/Clogging**3%
*“already 2 of them started chipping pretty badly when closing”*
**Leak-Proof**3%
*“leaks if turned upside down”*
**Heating**2%
*“Most crack when anything hot is put in them”*
### **Top return reasons **
**Size-Overall**72%
**Defective Material/Parts**8%
**Advertised Vs Actual Product**4%
**Quality-Overall**2%
**Functionality-Overall**2%
**Compatibility-Overall**1%
**Rusts/Corrodes**1%
**Ease Of Use**1%
**Storage Capacity**1%
**Maintenance And Repair**1%
## **Common questions**
- **Is small kilner jars profitable to sell on Amazon United Kingdom?**
- The niche generates £39K/yr across 19 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -21.2%. Flapen's verdict: Skip it (36/100).
- **How competitive is the small kilner jars niche?**
- 7 brands and 50 sellers compete. The top 5 products take 67% of clicks and top 5 brands hold 96% of demand.
- **What do buyers complain about in small kilner jars?**
- Top complaints mined from reviews: Size-Overall, Quality-Overall, Durability. The return rate is 0.7%.
- **What does it cost to enter the small kilner jars niche?**
- Listings span £1.43–£19.52; the average listing price is £9.32 (sweet spot $15–$100). The average incumbent carries 1,795 reviews — the moat a new listing must climb.
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