large envelopes
Skip itA small market ($31K/yr) — this niche doesn't clear our bar today.
Returns
Incredible0.3%return rate — above 5% kills the launch gate
Conversion
Incredible16.7%search→purchase rate — share of searches ending in a sale
Review moat
Okay1,501avg incumbent reviews — the moat a new listing must climb
Growth
Okay+9.0%90-day search growth — must beat 0% to launch
Quality gap
Okay4.6★avg incumbent rating — lower means beatable quality
Competition
Bad70%top-5 click share — a locked-up shelf
Avg price
Bad£7.11avg listing price — sweet spot $15–$100
Brand share
Bad94%top-5 brand share — brand-locked demand
Price range
Bad£2.44–£16.82cheapest to priciest tracked listing — scored on the share inside $15–$100
Market size
Bad£31K£31K/yr · 26K searches
According to Flapen's Amazon United Kingdom niche tracking, large envelopes is a £31K/yr Amazon United Kingdom market (26K searches/yr). The top 5 brands hold 94% of demand. Demand peaks in Oct–Nov. Verdict: Skip it — 39/100.
Data updated Jul 29, 2026 · scored weekly · How we score niches
large envelopes market data
- Units sold / yr
- 4K–5K
- avg 100–250/product
- Revenue / yr
- £28K–£36K
- units × avg price
- Conversion rate
- 16.7%
- Avg BSR
- #16
- Page quality
- 0%
- Prime
- 87%
- Sponsored
- 100%
- Out of stock
- 0.7%
- Avg brand age
- 50 months
- Avg seller age
- 180 days
Competition & brand share
The top 5 products capture 70% of clicks — a locked-up shelf that new listings rarely crack.Brands
8 falling
Sellers
34
Top-5 brand share
94%
Top 20: 100%
Top-5 click share
70%
Top 20: 100%
Open market
3%
- Blake52%
- Triplast18%
- evour14%
- Thymera7%
- iSOUL3%
- Q-Connect3%
- Open — no brand owns it (2 brands, 3%)
Demand & seasonality
Weekly Amazon search volume, last 103 weeks — +9.0% search growth over the last 90 days.Peak months: Oct, Nov · busiest ÷ quietest = 1.6×
Top large envelopes 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.
All 15 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Blake Purely Everyday - White Envelopes C4 (324 x 229 mm) - Pack of 25 - Paper 90GSM - Self Seal C4 Envelopes in White - Sustainable PEFC Certified - Business & Office Stationery (12891/25 PR)
Blake£3.394.6★2,928 rev
Evour A4/C4 Self Seal White Pocket Envelopes 229x324mm 100 GSM No Window for Home Office and Business Mailing Pack of 25
evour£5.934.6★1,616 rev
Blake Purely Everyday C4 324 x 229 mm 90gsm Self Seal Pocket Envelopes (FL2891) White - Pack of 250
Blake£12.954.6★1,041 rev
Triplast 100 x C4 White Self Seal Security Envelopes (Size: 324x229mm) | Fully Opaque Self Sealing & Printer Safe Mailing Paper Envelopes | Ideal for Everyday Home Office & Commercial Use
Triplast£8.924.5★1,900 rev
C4 Manilla Pocket Peel & Seal Envelopes A4 Brown Mailing Envelopes for Documents Letters & Office Post Strong Self Seal Kraft Postal Wallets (10)
Thymera£5.914.6★11 rev
Newest
by launch dateC4 Manilla Pocket Peel & Seal Envelopes A4 Brown Mailing Envelopes for Documents Letters & Office Post Strong Self Seal Kraft Postal Wallets (10)
Thymera£5.9111 rev
25 Packs A4 / C4 Self Seal Pocket Envelopes Kraft Peel and Seal Envelopes No Window Design Letter Envelope for Office Home School (Size: 324 x 229 mm)
amassan£7.7578 rev
Triplast 20 x C4 Manilla Self Seal Security Envelopes (Size: 324x229mm) | Fully Opaque Self Sealing & Printer Safe Mailing Paper Envelopes | Ideal for Everyday Home Office & Commercial Use
Triplast£3.45386 rev
Triplast 100 x C4 White Self Seal Security Envelopes (Size: 324x229mm) | Fully Opaque Self Sealing & Printer Safe Mailing Paper Envelopes | Ideal for Everyday Home Office & Commercial Use
Triplast£8.921,900 rev
Triplast 50 x C4 White Self Seal Security Envelopes (Size: 324x229mm) | Fully Opaque Self Sealing & Printer Safe Mailing Paper Envelopes | Ideal for Everyday Home Office & Commercial Use
Triplast£5.811,900 rev
Trending
90-day click momentumC4 Manilla Pocket Peel & Seal Envelopes A4 Brown Mailing Envelopes for Documents Letters & Office Post Strong Self Seal Kraft Postal Wallets (10)
Thymera£5.914.6★
Blake Purely Everyday C5 229 x 162 mm 80 gsm Gummed Pocket Envelopes (13848/50 PR) Manilla - Pack of 50
Blake£2.444.6★
Triplast 250 x C4 White Self Seal Security Envelopes (Size: 324x229mm) | Fully Opaque Self Sealing & Printer Safe Mailing Paper Envelopes | Ideal for Everyday Home Office & Commercial Use
Triplast£16.824.5★
Blake Purely Everyday - White Envelopes C4 (324 x 229 mm) - Pack of 25 - Paper 90GSM - Self Seal C4 Envelopes in White - Sustainable PEFC Certified - Business & Office Stationery (12891/25 PR)
Blake£3.394.6★
Triplast 50 x C4 White Self Seal Security Envelopes (Size: 324x229mm) | Fully Opaque Self Sealing & Printer Safe Mailing Paper Envelopes | Ideal for Everyday Home Office & Commercial Use
Triplast£5.814.5★
What buyers say about large envelopes
What buyers praise and complain about, mined from review topics.What buyers love
“Good quality envelopes”
“Worth buying”
“Did the job”
“Good size”
“The kraft paper is thick and fairly sturdy, so they withstand repeated use”
“Fairly robust, good value”
“Great envelopes slightly wider to take thicker letters”
“Easy for me than shop”
“Keeps contents protected”
“No issue with the paper”
What buyers complain about
“seal - rather the adhesive is exposed on both sides so not quite so convenient for storage etc”
“Very thin”
“Really poor quality”
“Envelopes used to be made of sturdier paper, but this product is pretty thin”
“Envelope smell awful like rotten fish”
“Thin”
“A bit costlier”
“Review of A4 do not bend envelopes”
“Only provided 19 instead of the 20 advertised”
Top return reasons
Common questions
- Is large envelopes profitable to sell on Amazon United Kingdom?
- The niche generates £31K/yr across 15 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is +9.0%. Flapen's verdict: Skip it (39/100).
- How competitive is the large envelopes niche?
- 8 brands and 34 sellers compete. The top 5 products take 70% of clicks and top 5 brands hold 94% of demand.
- What do buyers complain about in large envelopes?
- Top complaints mined from reviews: Adhesion/Stickiness, Thickness, Quality-Overall. The return rate is 0.3%.
- When does demand for large envelopes peak?
- Demand peaks in Oct–Nov; the busiest month runs 1.6× the quietest.
- What does it cost to enter the large envelopes niche?
- Listings span £2.44–£16.82; the average listing price is £7.11 (sweet spot $15–$100). The average incumbent carries 1,501 reviews — the moat a new listing must climb.