window envelopes
Skip itBrand-locked demand (top 5 brands take 99% of clicks) — this niche doesn't clear our bar today.
Conversion
Incredible22.8%search→purchase rate — share of searches ending in a sale
Returns
Incredible0.2%return rate — above 5% kills the launch gate
Review moat
Great482.45avg incumbent reviews — the moat a new listing must climb
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Price range
Okay£2.60–£19.45cheapest to priciest tracked listing — scored on the share inside $15–$100
Avg price
Bad£8.46avg listing price — sweet spot $15–$100
Growth
Bad-13.4%90-day search growth — must beat 0% to launch
Competition
Bad81%top-5 click share — a locked-up shelf
Market size
Bad£58K£58K/yr · 30K searches
Brand share
Bad99%top-5 brand share — brand-locked demand
According to Flapen's Amazon United Kingdom niche tracking, window envelopes is a £58K/yr Amazon United Kingdom market (30K searches/yr). The top 5 brands hold 99% of demand. Verdict: Skip it — 38/100.
Data updated Jul 21, 2026 · scored weekly · How we score niches
window envelopes market data
- Units sold / yr
- 8K–10K
- avg 500–750/product
- Revenue / yr
- £68K–£85K
- units × avg price
- Conversion rate
- 22.8%
- Avg BSR
- #39
- Page quality
- 0%
- Prime
- 73%
- Sponsored
- 100%
- Out of stock
- 8.3%
- Avg brand age
- 72 months
- Avg seller age
- 197 days
Competition & brand share
The top 5 products capture 81% of clicks — a locked-up shelf that new listings rarely crack.Brands
6 rising
Sellers
15
Top-5 brand share
99%
Top 20: 100%
Top-5 click share
81%
Top 20: 100%
Open market
0%
- Blake57%
- Postmaster17%
- Triplast15%
- RFE6%
- Globe Packaging3%
- MA NASIR1%
- Open — no brand owns it (0%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -13.4% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.3×
Top window envelopes search terms
- window envelopes11K/yr
- window envelopes self seal8K/yr
- envelopes with windows5K/yr
- dl window envelopes self seal 10003K/yr
- dl window envelopes4K/yr
Top window 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 11 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Blake Purely Everyday DL 110 x 220 mm 80gsm Self Seal Window Envelopes (FL2884/500) White - Pack of 500
Blake£11.624.5★915 rev
Blake Purely Everyday DL 110 x 220 mm 90 gsm Window Self Seal Wallet Envelopes (13884/50 PR) White - Pack of 50
Blake£3.104.6★461 rev
Postmaster DL Window Envelopes 110 x 220mm 80 GSM Self Seal White 1000 Pack
Postmaster£17.044.6★314 rev
Triplast 250 x DL Window Self Seal Security Envelopes (Size: 110x220mm) | Address Window Self Sealing & Printer Safe Mailing Paper Envelopes | Ideal for Everyday Home Office & Commercial Use
Triplast£8.644.6★581 rev
RFE Pack of 100 - DL White Mailing Envelopes with Window Self Seal for Posting mailing Home Office Ecommerce and Business 80gsm 110 x 220mm
RFE£8.314.7★8 rev
Newest
by launch date
DL White Window Envelopes Self Seal 110x220mm 100Gsm Peel and Seal Invoice Letter Envelopes with Clear Window Pack of 30
MA NASIR£3.035 rev
RFE Pack of 100 - DL White Mailing Envelopes with Window Self Seal for Posting mailing Home Office Ecommerce and Business 80gsm 110 x 220mm
RFE£8.318 rev
Postmaster DL Window Envelopes 110 x 220mm 80 GSM Self Seal White 1000 Pack
Postmaster£17.04314 rev
Triplast 250 x DL Window Self Seal Security Envelopes (Size: 110x220mm) | Address Window Self Sealing & Printer Safe Mailing Paper Envelopes | Ideal for Everyday Home Office & Commercial Use
Triplast£8.64581 rev
Triplast 100 x DL Window Self Seal Security Envelopes (Size: 110x220mm) | Address Window Self Sealing & Printer Safe Mailing Paper Envelopes | Ideal for Everyday Home Office & Commercial Use
Triplast£5.51581 rev
Trending
90-day click momentumDL White Window Envelopes Self Seal 110x220mm 100Gsm Peel and Seal Invoice Letter Envelopes with Clear Window Pack of 30
MA NASIR£3.033.8★
GP Globe Packaging 50 x DL White Window Self Seal Paper Envelopes (Size: 220x110mm) - Printer Safe & Fully Opaque - Security Mailing Envelopes for Home Office & Business Use
Globe Packaging£5.154.6★
Blake Purely Everyday C5 229 x 162 mm 90 gsm Self Seal Window Pocket Envelopes (13084/25 PR) White - Pack of 25
Blake£2.604.5★
Blake Purely Everyday DL 110 x 220 mm 90 gsm Window Self Seal Wallet Envelopes (13884/50 PR) White - Pack of 50
Blake£3.104.6★
RFE Pack of 100 - DL White Mailing Envelopes with Window Self Seal for Posting mailing Home Office Ecommerce and Business 80gsm 110 x 220mm
RFE£8.314.7★
What buyers say about window envelopes
What buyers praise and complain about, mined from review topics.What buyers love
“Good product, What's advertized is what you get”
“Great product - as described”
“Fit for purpose”
What buyers complain about
“struggle with quantity and price”
“adhesive is poor”
“Poor quality all round”
“the paper was a little thinner than expected”
“could be a bit thicker”
Top return reasons
Common questions
- Is window envelopes profitable to sell on Amazon United Kingdom?
- The niche generates £58K/yr across 11 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -13.4%. Flapen's verdict: Skip it (38/100).
- How competitive is the window envelopes niche?
- 6 brands and 15 sellers compete. The top 5 products take 81% of clicks and top 5 brands hold 99% of demand.
- What do buyers complain about in window envelopes?
- Top complaints mined from reviews: Value For Money, Adhesion/Stickiness, Quality-Overall. The return rate is 0.2%.
- When does demand for window envelopes peak?
- Demand is steady year-round — the busiest month runs 1.3× the quietest.
- What does it cost to enter the window envelopes niche?
- Listings span £2.60–£19.45; the average listing price is £8.46 (sweet spot $15–$100). The average incumbent carries 482 reviews — the moat a new listing must climb.