---
title: "Letter Box — £723K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/diy-tools/letter-box"
last_updated: "2026-07-31T12:34:52.005Z"
locale: en
meta:
description: "Niche score 58/100 · £723K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 58/100 · £723K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Letter Box — £723K/yr Amazon UK Niche (2026) - Flapen"
---
# **letter box**
**Worth a look**
Shows sweet-spot pricing room ($7.36–$80.66), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 69Growth 19Conversion 35Competition 83Returns 46Price range 87Avg price 83Brand share 68Review moat 48Quality gap 68
**Price range**
**Great****£7.36–£80.66**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Competition**
**Great****32%**
top-5 click share — an open shelf
**Avg price**
**Great****£18.32**
avg listing price — sweet spot $15–$100
**Market size**
**Good****£723K**
£723K/yr · 1.4M searches
**Brand share**
**Good****65%**
top-5 brand share — brands hold most of the demand
**Quality gap**
**Good****4.3★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Okay****1,732.66**
avg incumbent reviews — the moat a new listing must climb
**Returns**
**Okay****3.3%**
return rate — above 5% kills the launch gate
**Conversion**
**Okay****2.8%**
search→purchase rate — share of searches ending in a sale
**Growth**
**Bad****-11.7%**
90-day search growth — must beat 0% to launch
According to Flapen's Amazon United Kingdom niche tracking, letter box is a £723K/yr Amazon United Kingdom market (1.4M searches/yr). The top 5 brands hold 65% of demand. Verdict: Worth a look — 58/100.
Data updated Jul 22, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **letter box market data**
- **Units sold / yr**
- **30K–40K**
- avg 250–500/product
- **Revenue / yr**
- **£550K–£733K**
- units × avg price
- **Conversion rate**
- **2.8%**
- **Avg BSR**
- **#23**
- **Page quality**
- **0%**
- **Prime**
- **76%**
- **Sponsored**
- **96%**
- **Out of stock**
- **10.0%**
- **Avg brand age**
- **47 months**
- **Avg seller age**
- **179 days**
## **Competition & brand share**
Clicks spread well past the top 5 (32% combined) — an open shelf where new products get seen.
**Brands**
**25 **▼falling
**Sellers**
**44**
**Top-5 brand share**
**65%**
Top 20: 97%
**Top-5 click share**
**32%**
Top 20: 71%
**Open market**
**30%**
- SONGMICS32% - UAP11% - Burg-Wächter8% - GREABER7% - keypak6% - Bwintech5%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -11.7% search growth over the last 90 days.
35K25KPrime Day '25 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.3×
[**Open Trend **](https://flapen.com/research/uk/diy-tools/letter-box/trend)
## **Top letter box search terms**
- **letter box**418K/yr-11.3%2.1% conv. - **post box**289K/yr-10.5%2.0% conv. - **post boxes wall mounted waterproof**117K/yr-15.7%2.5% conv. - **letterbox**105K/yr-14.0%2.0% conv. - **letter box flap**64K/yr-13.6%1.5% conv. - **mail box**54K/yr-2.6%1.6% conv. - **postbox**43K/yr-8.3%2.3% conv. - **letterboxes & accessories**38K/yr-19.5%0.3% conv. - **post box wall mounted**34K/yr-24.2%2.3% conv. - **postbox for outside wall**33K/yr-12.3%2.6% conv. [**All search terms **](https://flapen.com/research/uk/diy-tools/letter-box/search-terms)
## **Top letter box 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%3%£22K6%£43K9%£65K12%£87K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**SONGMICS Post Box Wall Mounted Letterbox Mailbox with Sloped Roof Copper Lock Cylinder Swivel Cap Viewing Windows Nameplate Easy to Install 9 x 21.8 x 31.8 cm Grey GMB032GZ01**SONGMICS**£15.62**4.3★2,562 rev](https://www.amazon.co.uk/dp/B0F9JZ5BFV) [2**Post Boxes Wall Mounted Waterproof Steel Mail Box with 2 Keys Lockable Weatherproof Large Letter Lostal Boxes for Outside or Door 9 x 21.5 x 32 cm size**GREABER**£15.63**4.5★409 rev](https://www.amazon.co.uk/dp/B0C38ZZJYK) [3**SONGMICS Post Box Wall Mounted Letterbox Mailbox Copper Lock Cylinder with Swivel Cap Viewing Windows Nameplate Easy to Install 11.5 x 25.5 x 39.5 cm Anthracite Grey GMB031G01**SONGMICS**£20.25**4.3★2,562 rev](https://www.amazon.co.uk/dp/B0BVZ8SJBF) [4**Xfort MailPlate 12 Letterplate Polished Chrome Premium Draught Proof Postal Letterbox Telescopic Sleeved Letter Box for uPVC Doors with 20-40mm Door Thickness.**UAP**£11.87**4.3★3,697 rev](https://www.amazon.co.uk/dp/B09LHZNPGT) [5**lisetar Post Box Wall Mounted Steel Mail Box with Combination Lock - Weather-Resistant 3 Viewing Windows Rain Cover Lockable for Outside Black 40 x 25 x 10 cm**lisetar**£27.17**4.3★215 rev](https://www.amazon.co.uk/dp/B0F1F1VVCP)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**SONGMICS Modern Mailbox Lockable Wall-Mounted Post Letter Box with Newspaper Holder Easy to Install 9.5 x 29 x 31 cm Anthracite Grey GMB055G101**SONGMICS**£17.76**3,589 rev3mo ago](https://www.amazon.co.uk/dp/B0G526WRGQ) [**Amazon Basics Post Box Wall Mount Lockable Letter Box Durable Galvanised Steel for Daily Post and Small Parcels 32.5 x 21.5 x 9.0 cm Black**Amazon Basics**£10.12**316 rev10mo ago](https://www.amazon.co.uk/dp/B0DR15F8HJ) [**SONGMICS Post Box Wall Mounted Letterbox Mailbox with Sloped Roof Copper Lock Cylinder Swivel Cap Viewing Windows Nameplate Easy to Install 9 x 21.8 x 31.8 cm Grey GMB032GZ01**SONGMICS**£15.62**2,562 rev10mo ago](https://www.amazon.co.uk/dp/B0F9JZ5BFV) [**SONGMICS Post Box Wall Mounted Letterbox Mailbox with Sloped Roof Copper Lock Cylinder Swivel Cap Viewing Windows Nameplate Easy to Install 9 x 21.8 x 31.8 cm Black GMB032BZ01**SONGMICS**£15.71**2,562 rev10mo ago](https://www.amazon.co.uk/dp/B0F9KFN755) [**Burg Wachter Style Wall Mounted Steel Lockable Weather Resistant Post Box 31x21.5x7cm - Black**Burg-Wächter**£13.34**70 rev1y ago](https://www.amazon.co.uk/dp/B0FCSP5JZX)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**SONGMICS Modern Mailbox Lockable Wall-Mounted Post Letter Box with Newspaper Holder Easy to Install 9.5 x 29 x 31 cm Anthracite Grey GMB055G101**SONGMICS**£17.76**4.6★**▲ 288%**](https://www.amazon.co.uk/dp/B0G526WRGQ) [**SONGMICS Post Box Wall Mounted Letterbox Mailbox with Sloped Roof Copper Lock Cylinder Swivel Cap Viewing Windows Nameplate Easy to Install 9 x 21.8 x 31.8 cm Black GMB032BZ01**SONGMICS**£15.71**4.3★**▲ 132%**](https://www.amazon.co.uk/dp/B0F9KFN755) [**Amazon Basics Post Box Wall Mount Lockable Letter Box Durable Galvanised Steel for Daily Post and Small Parcels 32.5 x 21.5 x 9.0 cm Black**Amazon Basics**£10.12**4.6★**▲ 116%**](https://www.amazon.co.uk/dp/B0DR15F8HJ) [**Keypak 10.62 (27cm) Door Letter Box for 20-40mm Door Thickness Sleeved Letterplate for UPVC Composite Timber Doors Anti-Snap Flap Internal Draught Excluder (Black/White)**keypak**£11.20**4.1★**▲ 95%**](https://www.amazon.co.uk/dp/B0D42BJZHY) [**Burg-Wachter CLASSIC POST BOX CHAR GRN MB01CG Chartwell Green 36x37x13cm**Burg-Wächter**£23.76**4.5★**▲ 76%**](https://www.amazon.co.uk/dp/B00SEELE5Y)
**~~View all trending →~~**
## **What buyers say about letter box**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**21%
*“Excellent product”*
**Size-Overall**19%
*“Easy fit”*
**Value For Money**11%
*“Good value for money”*
**Advertised Vs Actual Product**10%
*“As described”*
**Assembly/Installation**9%
*“Easy to install”*
**Strength**5%
*“Easy to install and very sturdy”*
**Design-Overall**4%
*“Lovely design”*
**Ease Of Use**4%
*“Ease of use”*
**Mounting**2%
*“Easy to mount”*
**Color**2%
*“Lovely precise colour”*
### **What buyers complain about **
**Quality-Overall**16%
*“Rubbish quality”*
**Size-Overall**12%
*“Too small”*
**Rusts/Corrodes**9%
*“Started rusting after a few months”*
**Leak-Proof**7%
*“Leaking letterbox”*
**Durability**6%
*“Durability questionable”*
**Water Resistance**6%
*“Not rainproof”*
**Locking Mechanism**4%
*“Lock doesn't work”*
**Assembly/Installation**3%
*“Very Difficult to install”*
**Value For Money**2%
*“its over priced”*
**Moist/Dry**2%
*“Very Wet”*
### **Top return reasons **
**Size-Overall**72%
**Color**6%
**Defective Material/Parts**4%
**Compatibility-Overall**3%
**Quality-Overall**2%
**Functionality-Overall**1%
**Locking Mechanism**1%
**Thickness**1%
**Strength**1%
**Mechanism Issues**1%
## **Common questions**
- **Is letter box profitable to sell on Amazon United Kingdom?**
- The niche generates £723K/yr across 50 tracked products. 4 of 7 products launched in the last 360 days are still selling. 90-day search growth is -11.7%. Flapen's verdict: Worth a look (58/100).
- **How competitive is the letter box niche?**
- 25 brands and 44 sellers compete. The top 5 products take 32% of clicks and top 5 brands hold 65% of demand.
- **What do buyers complain about in letter box?**
- Top complaints mined from reviews: Quality-Overall, Size-Overall, Rusts/Corrodes. The return rate is 3.3%.
- **When does demand for letter box peak?**
- Demand is steady year-round — the busiest month runs 1.3× the quietest.
- **What does it cost to enter the letter box niche?**
- Listings span £7.36–£80.66; the average listing price is £18.32 (sweet spot $15–$100). The average incumbent carries 1,733 reviews — the moat a new listing must climb.
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