---
title: "Large Postage Bags — £416K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/business-industry-science/large-postage-bags"
last_updated: "2026-07-31T13:05:12.819Z"
locale: en
meta:
description: "Niche score 44/100 · £416K/yr market · 707K searches/yr · £4.48 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 44/100 · £416K/yr market · 707K searches/yr · £4.48 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Large Postage Bags — £416K/yr Amazon UK Niche (2026) - Flapen"
---
# **large postage bags**
**Skip it**
Prices mostly outside the sweet spot ($2.59–$8.10) — this niche doesn't clear our bar today.
Market size 56Growth 11Conversion 96Competition 46Returns 100Price range 0Avg price 12Brand share 27Review moat 25Quality gap 33
**Returns**
**Incredible****0.1%**
return rate — above 5% kills the launch gate
**Conversion**
**Incredible****13.2%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Good****£416K**
£416K/yr · 707K searches
**Competition**
**Okay****57%**
top-5 click share — leaders hold, buyers still browse
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Brand share**
**Okay****89%**
top-5 brand share — brands hold most of the demand
**Review moat**
**Bad****4,866.71**
avg incumbent reviews — the moat a new listing must climb
**Avg price**
**Bad****£4.48**
avg listing price — sweet spot $15–$100
**Growth**
**Bad****-27.2%**
90-day search growth — must beat 0% to launch
**Price range**
**Bad****£2.59–£8.10**
cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United Kingdom niche tracking, large postage bags is a £416K/yr Amazon United Kingdom market (707K searches/yr). The top 5 brands hold 89% of demand. Demand peaks in Oct–Nov. Verdict: Skip it — 44/100.
Data updated Jul 21, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **large postage bags market data**
- **Units sold / yr**
- **80K–100K**
- avg 4,000–5,000/product
- **Revenue / yr**
- **£358K–£448K**
- units × avg price
- **Conversion rate**
- **13.2%**
- **Avg BSR**
- **#9**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **90%**
- **Out of stock**
- **6.7%**
- **Avg brand age**
- **41 months**
- **Avg seller age**
- **173 days**
## **Competition & brand share**
The top 5 products take 57% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**9 **▲rising
**Sellers**
**15**
**Top-5 brand share**
**89%**
Top 20: 100%
**Top-5 click share**
**57%**
Top 20: 99%
**Open market**
**6%**
- iSOUL31% - Paxfords21% - Double Dragon18% - JeeJaan12% - G4GADGET7% - Calzette5% - Open — no brand owns it (3 brands, 6%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -27.2% search growth over the last 90 days.
18K13KSpike '24Spike '25 seasonSepDecMarJunAugNovMarMay
Peak months: Oct, Nov · busiest ÷ quietest = 2.1×
[**Open Trend **](https://flapen.com/research/uk/business-industry-science/large-postage-bags/trend)
## **Top large postage bags search terms**
- **large postage bags**162K/yr-39.1%12.0% conv. - **large parcel bags**101K/yr-16.8%12.5% conv. - **parcel bags large**66K/yr-18.8%11.4% conv. - **large mailing bags**76K/yr-21.1%8.7% conv. - **postage bags large**41K/yr-2.6%9.8% conv. - **mailing bags large**30K/yr-35.7%8.1% conv. - **extra large postage bags**33K/yr-44.9%15.3% conv. - **large shipping bags**21K/yr-20.7%11.0% conv. - **large postal bags**18K/yr-18.1%10.0% conv. - **large packing bags**13K/yr+35.4%5.0% conv. [**All search terms **](https://flapen.com/research/uk/business-industry-science/large-postage-bags/search-terms)
## **Top large postage bags 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%£42K20%£83K30%£125K40%£167K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 21 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1![25 x Strong Large Grey Mailing Postal Postage Bags 17 x 24 Packaging Mailers [Use in Parcel Delivery Shipping Mail Package] [432mm x 610mm]](https://m.media-amazon.com/images/I/31LX25wEzIS.jpg)**25 x Strong Large Grey Mailing Postal Postage Bags 17 x 24 Packaging Mailers \[Use in Parcel Delivery Shipping Mail Package\] \[432mm x 610mm\]**iSOUL**£5.02**4.7★8,846 rev](https://www.amazon.co.uk/dp/B08MFMSKJF) [2**Paxfords Large Postage Bags for Clothes 17x24- Extra Strong Packing Bags for Posting - Strong Self-Seal Packaging Postal Bags - Grey Recyclable Mailing and Shipping Mailers (5)**Paxfords**£4.74**4.7★309 rev](https://www.amazon.co.uk/dp/B0FW4SXMS3) [3**Double Dragon 60 Mixed Size Self-Seal Mailer Bags | Tamper-Proof Plastic Packaging for Mailing Postage Shipping & Delivery | Grey (4 Sizes | Small to Large | 15 Each)**Double Dragon**£3.18**4.3★13,980 rev](https://www.amazon.co.uk/dp/B0CJ63CKFY) [4**Double Dragon 25-Pack 17x24 Self-Seal Grey Large Mailer Bags |Self-Seal Shipping Envelopes | Strong Waterproof Tamper-Proof Polythene Packaging for Clothes Bedding & Parcels (Also for Storage)**Double Dragon**£5.05**4.2★5,390 rev](https://www.amazon.co.uk/dp/B0DNWLB1R7) [5**Large Postage Bags for Clothes 22x30- Extra Strong Packing Bags for Posting - Strong Self-Seal Packaging Postal Bags - Grey Recyclable Mailing and Shipping Mailers (5)**Paxfords**£5.09**4.7★143 rev](https://www.amazon.co.uk/dp/B0G4BLM3PK)
**~~View all top sellers →~~**
### **Newest**
by launch date
[![25 x Strong Large Baby Pink Mailing Postal Postage Bags 17 x 24 Packaging Mailers [Use in Parcel Delivery Shipping Mail Package] [432mm x 610mm] Pink](https://m.media-amazon.com/images/I/3180zBqKJYL.jpg)**25 x Strong Large Baby Pink Mailing Postal Postage Bags 17 x 24 Packaging Mailers \[Use in Parcel Delivery Shipping Mail Package\] \[432mm x 610mm\] Pink**iSOUL**£5.87**73 rev4mo ago](https://www.amazon.co.uk/dp/B0GRGXH3LG) [**Large Postage Bags for Clothes 22x30- Extra Strong Packing Bags for Posting - Strong Self-Seal Packaging Postal Bags - Grey Recyclable Mailing and Shipping Mailers (5)**Paxfords**£5.09**143 rev7mo ago](https://www.amazon.co.uk/dp/B0G4BLM3PK) [**Paxfords Large Postage Bags for Clothes 17x24- Extra Strong Packing Bags for Posting - Strong Self-Seal Packaging Postal Bags - Grey Recyclable Mailing and Shipping Mailers (5)**Paxfords**£4.74**309 rev9mo ago](https://www.amazon.co.uk/dp/B0FW4SXMS3) [**delka Mailing Bags Durable Pink Poly Mailer Bags Tear-Resistant Shipping Envelopes for Clothing Documents Strong Self-Seal Adhesive Waterproof & Lightweight (6x9 50PK)**delka**£2.67**556 rev1y ago](https://www.amazon.co.uk/dp/B0DPGJYZG2) [**125 Assorted Mixed Pink Mailing Poly Postal Self Seal Bags 5 Sizes 25 from Each iSOUL Extra Small to Large Postage Packaging Assorted Mailers Posting Shipping Post Parcels Package Bags**iSOUL**£5.21**2,197 rev1y ago](https://www.amazon.co.uk/dp/B0DKBVLJL9)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Large Postage Bags 17x24 for Clothes - Extra Strong Packing Bags for Posting - Strong Self-Seal Packaging Postal Bags - Grey Recyclable Mailing and Shipping Mailers (5)**JeeJaan**£3.84**4.7★**▲ 340%**](https://www.amazon.co.uk/dp/B08JTM386M) [![25 x Strong Large Baby Pink Mailing Postal Postage Bags 17 x 24 Packaging Mailers [Use in Parcel Delivery Shipping Mail Package] [432mm x 610mm] Pink](https://m.media-amazon.com/images/I/3180zBqKJYL.jpg)**25 x Strong Large Baby Pink Mailing Postal Postage Bags 17 x 24 Packaging Mailers \[Use in Parcel Delivery Shipping Mail Package\] \[432mm x 610mm\] Pink**iSOUL**£5.87**4.4★**▲ 336%**](https://www.amazon.co.uk/dp/B0GRGXH3LG) [**JeeJaan 20 Large Grey Parcel Bags 14 x 21 - (356 x 533mm) Strong Polythene Self Adhesive Waterproof Postage Bags | Envelope Courier Shipping Postal Bags**JeeJaan**£4.28**4.7★**▲ 183%**](https://www.amazon.co.uk/dp/B08JTD9QX1) [**125 Assorted Mixed Pink Mailing Poly Postal Self Seal Bags 5 Sizes 25 from Each iSOUL Extra Small to Large Postage Packaging Assorted Mailers Posting Shipping Post Parcels Package Bags**iSOUL**£5.21**4.6★**▲ 162%**](https://www.amazon.co.uk/dp/B0DKBVLJL9) [**Large Postage Bags for Clothes 22x30- Extra Strong Packing Bags for Posting - Strong Self-Seal Packaging Postal Bags - Grey Recyclable Mailing and Shipping Mailers (5)**Paxfords**£5.09**4.7★**▲ 157%**](https://www.amazon.co.uk/dp/B0G4BLM3PK)
**~~View all trending →~~**
## **What buyers say about large postage bags**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**22%
*“Good size bag”*
**Quality-Overall**19%
*“These bags are really good quality”*
**Value For Money**16%
*“Good price”*
**Strength**11%
*“Great strong bags”*
**Advertised Vs Actual Product**6%
*“As advertised”*
**Ease Of Use**3%
*“Easy to use”*
**Thickness**3%
*“Good thickness”*
**Durability**3%
*“very durable”*
**Adhesion/Stickiness**2%
*“They stick really well”*
**Color**2%
*“Love the colour”*
### **What buyers complain about **
**Quality-Overall**30%
*“Cheap quality”*
**Thickness**22%
*“Not the thickest bags”*
**Size-Overall**9%
*“Too small”*
**Adhesion/Stickiness**9%
*“Tape wont stick”*
**Strength**5%
*“not at robust”*
**Material Quality**3%
*“the material is different”*
**Smell**2%
*“Horrid smell”*
**Value For Money**2%
*“Not worth the money AT ALL”*
**Durability**2%
*“breaks easy”*
**Advertised Vs Actual Product**2%
*“Inaccurate description”*
### **Top return reasons **
**Size-Overall**58%
**Quality-Overall**12%
**Thin**12%
**Advertised Vs Actual Product**2%
**Smell**2%
**Thickness**2%
**Strength**2%
**Adhesion/Stickiness**1%
**Color**1%
**Functionality-Overall**1%
## **Common questions**
- **Is large postage bags profitable to sell on Amazon United Kingdom?**
- The niche generates £416K/yr across 21 tracked products. 1 of 3 products launched in the last 360 days are still selling. 90-day search growth is -27.2%. Flapen's verdict: Skip it (44/100).
- **How competitive is the large postage bags niche?**
- 9 brands and 15 sellers compete. The top 5 products take 57% of clicks and top 5 brands hold 89% of demand.
- **What do buyers complain about in large postage bags?**
- Top complaints mined from reviews: Quality-Overall, Thickness, Size-Overall. The return rate is 0.1%.
- **When does demand for large postage bags peak?**
- Demand peaks in Oct–Nov; the busiest month runs 2.1× the quietest.
- **What does it cost to enter the large postage bags niche?**
- Listings span £2.59–£8.10; the average listing price is £4.48 (sweet spot $15–$100). The average incumbent carries 4,867 reviews — the moat a new listing must climb.
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