do not bend envelopes
Skip itPrices mostly outside the sweet spot ($3.39–$8.30) — this niche doesn't clear our bar today.
Returns
Incredible0.4%return rate — above 5% kills the launch gate
Conversion
Great9.8%search→purchase rate — share of searches ending in a sale
Review moat
Good563.33avg incumbent reviews — the moat a new listing must climb
Growth
Bad-4.5%90-day search growth — must beat 0% to launch
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Avg price
Bad£5.38avg listing price — sweet spot $15–$100
Competition
Bad87%top-5 click share — a locked-up shelf
Market size
Bad£41K£41K/yr · 77K searches
Brand share
Bad98%top-5 brand share — brand-locked demand
Price range
Bad£3.39–£8.30cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United Kingdom niche tracking, do not bend envelopes is a £41K/yr Amazon United Kingdom market (77K searches/yr). The top 5 brands hold 98% of demand. Verdict: Skip it — 32/100.
Data updated Jul 21, 2026 · scored weekly · How we score niches
do not bend envelopes market data
- Units sold / yr
- 6K–8K
- avg 250–500/product
- Revenue / yr
- £32K–£43K
- units × avg price
- Conversion rate
- 9.8%
- Avg BSR
- #25
- Page quality
- 0%
- Prime
- 78%
- Sponsored
- 100%
- Out of stock
- 3.4%
- Avg brand age
- 46 months
- Avg seller age
- 181 days
Competition & brand share
The top 5 products capture 87% of clicks — a locked-up shelf that new listings rarely crack.Brands
6 falling
Sellers
11
Top-5 brand share
98%
Top 20: 100%
Top-5 click share
87%
Top 20: 100%
Open market
0%
- Double Dragon43%
- Postmaster24%
- iSOUL21%
- AKAR5%
- STRBOXONG5%
- UKPAPER2%
Demand & seasonality
Weekly Amazon search volume, last 83 weeks — -4.5% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.3×
Top do not bend envelopes search terms
- do not bend envelopes27K/yr
- cardboard envelopes16K/yr
- hardback envelopes5K/yr
- please do not bend envelopes4K/yr
- hard back envelopes3K/yr
- do not bend envelopes a64K/yr
- a6 hardback envelopes3K/yr
- a6 do not bend envelopes3K/yr
- hard envelopes3K/yr
- card backed envelopes3K/yr
Top do not bend 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 9 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Double Dragon 50-Pack A6 C6 Manilla Hard Board Backed Envelopes | 162mm x 114mm | Please Do Not Bend Printed | Padded & Tamper-Proof | Self-Seal Closure
Double Dragon£6.234.7★480 rev
20Pcs A4 Envelopes Self-Seal iSOUL 324mm x 229mm A4 C4 Manilla Hard Board Backed Envelopes Do Not Bend Envelope
iSOUL£5.204.7★2,152 rev
Postmaster Please Do Not Bend Envelopes A5 Hardback Peel Seal x 10 Pack C5 Boardback 229 x 162mm
Postmaster£3.394.7★285 rev
Postmaster A5 C5 Do Not Bend Board Back Envelopes 229 x 162 mm Peel Seal 50 Pack Brown
Postmaster£7.774.6★1,018 rev
AKAR Do Not Bend Packaging - A6 Hard Backed Envelopes (162 x 114mm) Cardboard Mailers (Pack of 25)
AKAR£4.564.7★157 rev
Newest
by launch date
STRBOXONG A6 Hardback Envelopes Do Not Bend C6 Hard Board Backed Envelopes Peel and Seal for 6x4 Photos & Money Gifts Brown Manilla Cardboard Mailers 162 x 114mm Royal Mail Letter(10 Pcs)
STRBOXONG£3.705 rev
UKPAPER 100 A6 / C6 162mm x 114mm Brown/Manilla Strong Hard Card Board Backed Peel and Seal Printed Please Do Not Bend Envelopes x100
UKPAPER£8.3013 rev
Double Dragon 50-Pack A6 C6 Manilla Hard Board Backed Envelopes | 162mm x 114mm | Please Do Not Bend Printed | Padded & Tamper-Proof | Self-Seal Closure
Double Dragon£6.23480 rev
Double Dragon 20-Pack A4 C4 Manilla Hard Board Backed Envelopes | 324mm x 229mm | Please Do Not Bend Printed | Padded & Tamper-Proof | Self-Seal Closure
Double Dragon£4.92480 rev
Double Dragon 20-Pack A5 C5 Manilla Hard Board Backed Envelopes | 229mm x 162mm | Please Do Not Bend Printed | Padded & Tamper-Proof | Self-Seal Closure
Double Dragon£4.34480 rev
Trending
90-day click momentumSTRBOXONG A6 Hardback Envelopes Do Not Bend C6 Hard Board Backed Envelopes Peel and Seal for 6x4 Photos & Money Gifts Brown Manilla Cardboard Mailers 162 x 114mm Royal Mail Letter(10 Pcs)
STRBOXONG£3.704.8★
Double Dragon 50-Pack A6 C6 Manilla Hard Board Backed Envelopes | 162mm x 114mm | Please Do Not Bend Printed | Padded & Tamper-Proof | Self-Seal Closure
Double Dragon£6.234.7★
20Pcs A4 Envelopes Self-Seal iSOUL 324mm x 229mm A4 C4 Manilla Hard Board Backed Envelopes Do Not Bend Envelope
iSOUL£5.204.7★
Postmaster Please Do Not Bend Envelopes A5 Hardback Peel Seal x 10 Pack C5 Boardback 229 x 162mm
Postmaster£3.394.7★
AKAR Do Not Bend Packaging - A6 Hard Backed Envelopes (162 x 114mm) Cardboard Mailers (Pack of 25)
AKAR£4.564.7★
What buyers say about do not bend envelopes
What buyers praise and complain about, mined from review topics.What buyers love
“Decent Quality”
“Excellent value for money”
“As shown”
“just the right size”
“Sturdy and do their job”
“Well protected”
“easy to use”
“flat for posting”
“Great for cards and prints”
“had no complaints so they are durable”
What buyers complain about
“This cannot be erased or wiped away so there is not excuse once its left your hands for anyone to alter its shape”
“Expensive when purchased in a pack of ten”
“Review of A4 do not bend envelopes”
“Only provided 19 instead of the 20 advertised”
Top return reasons
Common questions
- Is do not bend envelopes profitable to sell on Amazon United Kingdom?
- The niche generates £41K/yr across 9 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -4.5%. Flapen's verdict: Skip it (32/100).
- How competitive is the do not bend envelopes niche?
- 6 brands and 11 sellers compete. The top 5 products take 87% of clicks and top 5 brands hold 98% of demand.
- What do buyers complain about in do not bend envelopes?
- Top complaints mined from reviews: Erasability, Value For Money, Flexibility. The return rate is 0.4%.
- When does demand for do not bend envelopes peak?
- Demand is steady year-round — the busiest month runs 1.3× the quietest.
- What does it cost to enter the do not bend envelopes niche?
- Listings span £3.39–£8.30; the average listing price is £5.38 (sweet spot $15–$100). The average incumbent carries 563 reviews — the moat a new listing must climb.