A3 Envelopes
a small market ($36K/yr) — A3 Envelopes doesn't clear our bar today.
Flapen Score
Is A3 Envelopes profitable on Amazon?
According to Flapen's Amazon United Kingdom niche tracking, A3 Envelopes is a £36K/yr Amazon United Kingdom market (41K searches/yr). The top 5 brands hold 95% of demand. Demand peaks in Nov–Dec. Verdict: Skip it — 36/100.
A3 Envelopes: the Amazon niche in one read
Everything a seller checks before entering, in three answers.
Is the demand real?
Not really. Search demand moved -7.5% over the last 90 days and 9.2% of searches end in a purchase.
£36K
revenue / yr
Who owns the niche?
The top 5 brands hold 95% of demand, so 5% of the market is open.
5%
open market share
Is there a way in?
Listing quality. The average product page scores 0/100 on content standards. Incumbents average 4.6★ — the gap to enter on.
0/100
page quality · 13 products
Top A3 Envelopes products & what they sell for
Every tracked product — its share of the shelf, its review moat, and what it sells for.
Top sellers
by 90-day click share
Double Dragon 10-Pack A3 C3 Brown/Manilla Strong Hard Board Backed Self-Seal Envelopes - 457mm x 324mm - Printed Please Do Not Bend Envelope
- Price
- £5.77
- Rating
- 4.7/5
- Reviews
- 480
- Age
- 1y ago

Blake Purely Everyday C4 324 x 229 mm 90 gsm Self Seal Pocket Envelopes (12891/50 PR) White - Pack of 50
- Price
- £4.93
- Rating
- 4.6/5
- Reviews
- 4,982
- Age
- 8y ago

Q-Connect C3 Envelope 457x324mm Pocket Self Seal 115gsm Manilla (Pack of 125)
- Price
- £19.71
- Rating
- 4.5/5
- Reviews
- 121
- Age
- 19y ago

Double Dragon 20-Pack A3 C3 Manilla Hard Board Backed Envelopes | 458mm x 324mm | Please Do Not Bend Printed | Padded & Tamper-Proof | Self-Seal Closure
- Price
- £8.31
- Rating
- 4.7/5
- Reviews
- 480
- Age
- 1y ago

Triplast 50 x A3 C3 Manilla Hard Board Back Envelopes (457x324mm) - Cardboard Backed Mailers with Peel & Seal Strip - Rigid Do Not Bend Envelopes for Mailing Posting Shipping & Storing Documents
- Price
- £18.26
- Rating
- 4.6/5
- Reviews
- 955
- Age
- 10y ago
Trending
90-day click momentum
Double Dragon 50-Pack A3 C3 Manilla Hard Board Backed Envelopes | 458mm x 324mm | Please Do Not Bend Printed | Padded & Tamper-Proof | Self-Seal Closure
- Price
- £15.41
- Rating
- 4.7/5
- Reviews
- 480
- Age
- 1y ago

Double Dragon 10-Pack A3 C3 Brown/Manilla Strong Hard Board Backed Self-Seal Envelopes - 457mm x 324mm - Printed Please Do Not Bend Envelope
- Price
- £5.77
- Rating
- 4.7/5
- Reviews
- 480
- Age
- 1y ago

Triplast 50 x A3 C3 Manilla Hard Board Back Envelopes (457x324mm) - Cardboard Backed Mailers with Peel & Seal Strip - Rigid Do Not Bend Envelopes for Mailing Posting Shipping & Storing Documents
- Price
- £18.26
- Rating
- 4.6/5
- Reviews
- 955
- Age
- 10y ago

Q-Connect C3 Envelope 457x324mm Pocket Self Seal 115gsm Manilla (Pack of 125)
- Price
- £19.71
- Rating
- 4.5/5
- Reviews
- 121
- Age
- 19y ago

Blake Purely Everyday C4 324 x 229 mm 90 gsm Gummed Pocket Envelopes (13854/25 PR) Manilla - Pack of 25
- Price
- £3.67
- Rating
- 4.6/5
- Reviews
- 5,819
- Age
- 12y ago
Newest
by launch date
Double Dragon 10-Pack A3 C3 Brown/Manilla Strong Hard Board Backed Self-Seal Envelopes - 457mm x 324mm - Printed Please Do Not Bend Envelope
- Price
- £5.77
- Rating
- 4.7/5
- Reviews
- 480
- Age
- 1y ago

Double Dragon 20-Pack A3 C3 Manilla Hard Board Backed Envelopes | 458mm x 324mm | Please Do Not Bend Printed | Padded & Tamper-Proof | Self-Seal Closure
- Price
- £8.31
- Rating
- 4.7/5
- Reviews
- 480
- Age
- 1y ago

Double Dragon 50-Pack A3 C3 Manilla Hard Board Backed Envelopes | 458mm x 324mm | Please Do Not Bend Printed | Padded & Tamper-Proof | Self-Seal Closure
- Price
- £15.41
- Rating
- 4.7/5
- Reviews
- 480
- Age
- 1y ago
![AKAR A3 C3 (45x32 cm - 457x324 mm) Printed Manilla Hard-Backed Envelope with Card [Pack of 5]](https://m.media-amazon.com/images/I/31HfWI+s9RL.jpg)
AKAR A3 C3 (45x32 cm - 457x324 mm) Printed Manilla Hard-Backed Envelope with Card [Pack of 5]
- Price
- £4.73
- Rating
- 4.5/5
- Reviews
- 38
- Age
- 2y ago

Evour A4/C4 Self Seal White Pocket Envelopes 229x324mm 100 GSM No Window for Home Office and Business Mailing Pack of 25
- Price
- £5.92
- Rating
- 4.6/5
- Reviews
- 1,608
- Age
- 5y ago
Competition: brands, sellers & click share
The top 5 products take 69% of clicks — established leaders, but buyers still shop beyond them.
Brands
7 falling
Sellers
24
Top-5 brand share
95%
Top 20: 100%
Top-5 click share
69%
Top 20: 100%
Open market
2%
- Double Dragon45%
- Blake19%
- Triplast17%
- Q-Connect9%
- AKAR5%
- ARPAN3%
- Open — no brand owns it (1 brand, 2%)
A3 Envelopes demand & seasonality
Weekly search volume, with the niche's key stats alongside.
Peak months: Nov, Dec · busiest ÷ quietest = 1.7×
Top A3 Envelopes search terms shoppers use
The exact queries shoppers type, with yearly volume, growth and conversion.
- a3 envelopes21K/yr
- a3 envelopes hardback6K/yr
- c3 envelopes5K/yr
- a3 envelope3K/yr
- a3 do not bend envelopes3K/yr
- a3 hardback envelopes3K/yr
What reviews say buyers love and hate about A3 Envelopes
What buyers mention most, as a share of all reviews.
What buyers love
98% of reviews“Decent value for money”
“Good quality”
“As described”
“Fit was good”
“Robust, good value too”
What buyers complain about
88% of reviews“Very poor quality”
“Too large”
“doesn't stick down well so have to use sellotape or they would come open in the mail”
“could be slightly sturdier”
A3 Envelopes return rate & reasons
Why buyers send it back, as a share of all return requests.
0.3%
Return rate
78%
Fixable by listing
The "fixable" share counts expectation-mismatch reasons — size, look, advertised-vs-actual — that better copy and images address.
Common A3 Envelopes questions
The questions sellers ask about this niche, answered from the tracked metrics.
Best Flapen score
The highest-scoring niches we track right now, across every category.









