Is a5 envelopes profitable to sell on Amazon United Kingdom?

The niche generates £538K/yr across 12 tracked products. 90-day search growth is -11.4%. Flapen's verdict: Skip it (44/100).

How competitive is the a5 envelopes niche?

8 brands and 50 sellers compete. The top 5 products take 81% of clicks and top 5 brands hold 93% of demand.

What do buyers complain about in a5 envelopes?

Top complaints mined from reviews: Quality-Overall, Thickness, Adhesion/Stickiness. The return rate is 0.2%.

When does demand for a5 envelopes peak?

Demand peaks in Dec; the busiest month runs 1.8× the quietest.

What does it cost to enter the a5 envelopes niche?

Listings span £3.23–£19.10; the average listing price is £7.81 (sweet spot $15–$100). The average incumbent carries 2,026 reviews — the moat a new listing must climb.

a5 envelopes

Skip it

A concentrated shelf (top 5 take 81% of clicks) — this niche doesn't clear our bar today.

Returns

Incredible0.2%

return rate — above 5% kills the launch gate

Conversion

Incredible17.4%

search→purchase rate — share of searches ending in a sale

Market size

Good£538K

£538K/yr · 396K searches

Review moat

Okay2,026.42

avg incumbent reviews — the moat a new listing must climb

Quality gap

Okay4.6★

avg incumbent rating — lower means beatable quality

Price range

Okay£3.23–£19.10

cheapest to priciest tracked listing — scored on the share inside $15–$100

Avg price

Bad£7.81

avg listing price — sweet spot $15–$100

Growth

Bad-11.4%

90-day search growth — must beat 0% to launch

Brand share

Bad93%

top-5 brand share — brand-locked demand

Competition

Bad81%

top-5 click share — a locked-up shelf

According to Flapen's Amazon United Kingdom niche tracking, a5 envelopes is a £538K/yr Amazon United Kingdom market (396K searches/yr). The top 5 brands hold 93% of demand. Demand peaks in Dec. Verdict: Skip it — 44/100.

Data updated Jul 29, 2026 · scored weekly · How we score niches

a5 envelopes market data

Units sold / yr: 60K–80K; avg 5,000–6,000/product
Revenue / yr: £469K–£625K; units × avg price
Conversion rate: 17.4%
Avg BSR: #91
Page quality: 0%
Prime: 83%
Sponsored: 92%
Out of stock: 0.0%
Avg brand age: 46 months
Avg seller age: 179 days

Competition & brand share

The top 5 products capture 81% of clicks — a locked-up shelf that new listings rarely crack.

Brands

8 falling

Sellers

Top-5 brand share

93%

Top 20: 100%

Top-5 click share

81%

Top 20: 100%

Open market

Triplast35%
Tallon34%
Blake17%
Postmaster4%
FIRST CHOICE KAYA3%
evour3%
Open — no brand owns it (2 brands, 4%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -11.4% search growth over the last 90 days.

Peak months: Dec · busiest ÷ quietest = 1.8×

Open Trend

Top a5 envelopes search terms

a5 envelopes160K/yr -7.5%12.9% conv.
envelopes a561K/yr -4.8%12.5% conv.
c5 envelopes69K/yr -13.3%6.9% conv.
a5 envelopes peel and seal17K/yr -11.6%20.3% conv.
c5 envelopes peel and seal17K/yr -33.3%9.6% conv.
a5 envelope10K/yr -5.5%6.2% conv.
envelopes c513K/yr -50.7%8.0% conv.
a5 size envelopes7K/yr -3.4%4.2% conv.
a5 white envelopes7K/yr -5.6%14.1% conv.
c5 envelope5K/yr -12.7%5.6% conv.

All search terms

Top a5 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 12 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

C5 / A5 White Peel & Seal Envelopes Pack of 30

Tallon£3.294.5★3,144 rev

Triplast 50 x C5 White Self Seal Security Envelopes (Size: 229x164mm) | Fully Opaque Self Sealing & Printer Safe Mailing Paper Envelopes | Ideal for Everyday Home Office & Commercial Use

Triplast£4.364.5★1,900 rev

Triplast 20 x C5 White Self Seal Security Envelopes (Size: 229x164mm) | Fully Opaque Self Sealing & Printer Safe Mailing Paper Envelopes | Ideal for Everyday Home Office & Commercial Use

Triplast£3.234.5★1,900 rev

Blake Purely Everyday C5 229 x 162 mm 90 gsm Pocket Self Seal Envelopes (13893/50 PR) White - Pack of 50

Blake£3.354.7★4,847 rev

Triplast 100 x C5 White Self Seal Security Envelopes (Size: 229x164mm) | Fully Opaque Self Sealing & Printer Safe Mailing Paper Envelopes | Ideal for Everyday Home Office & Commercial Use

Triplast£6.654.5★1,900 rev

Newest

by launch date

RFE Pack of 100 - C5 / A5 White Mailing Envelopes Self Seal for Posting mailing Home Office Ecommerce and Business 90gsm 229 x 162mm

RFE£9.946 rev

1y ago

Karma Krafts C5 Ivory Cream Envelopes 162 x 229mm 100gsm Gummed Diamond Flap Fits A5 Cards Wedding & Invitation Envelopes Pack of 25

Karma Krafts£6.4544 rev

3y ago

Postmaster A5 Envelopes 229 x 162 mm C5 90 GSM Self Seal White 500 Pack

Postmaster£16.521,365 rev

3y ago

Triplast 20 x C5 White Self Seal Security Envelopes (Size: 229x164mm) | Fully Opaque Self Sealing & Printer Safe Mailing Paper Envelopes | Ideal for Everyday Home Office & Commercial Use

Triplast£3.231,900 rev

4y ago

Triplast 50 x C5 White Self Seal Security Envelopes (Size: 229x164mm) | Fully Opaque Self Sealing & Printer Safe Mailing Paper Envelopes | Ideal for Everyday Home Office & Commercial Use

Triplast£4.361,900 rev

4y ago

What buyers say about a5 envelopes

What buyers praise and complain about, mined from review topics.

What buyers love

Quality-Overall30%

“Great quality, arrived quickly”

Value For Money22%

“Fair price”

Advertised Vs Actual Product17%

“Do exactly as expected”

Size-Overall6%

“The size is great”

Adhesion/Stickiness5%

“Always good quality stick fine”

Paper Quality4%

“Good substantial paper”

Strength2%

“strong envelopes”

Correct Contents2%

“Good lot”

Color2%

“a great white colour”

Ease Of Use2%

“Easy to use”

What buyers complain about

Quality-Overall29%

“Average quality”

Thickness16%

“that shows in the thickness of the paper so are a lower quality”

Adhesion/Stickiness14%

“Stickiness was non existent”

Paper Quality7%

“that shows in the thickness of the paper so are a lower quality”

Size-Overall6%

“Large”

Value For Money6%

“The stamp is the expensive bit”

Thin5%

“Very thin”

Strength4%

“getting better quality as these are flimsy”

Ease Of Use3%

“Tends to lift easily”

Weight Light2%

“Too lightweight”

Top return reasons

Size-Overall69%

Quality-Overall10%

Thin6%

Adhesion/Stickiness4%

Advertised Vs Actual Product2%

Color2%

Paper Quality1%

Thickness1%

Functionality-Overall1%

Ease Of Cleaning1%

Common questions

Is a5 envelopes profitable to sell on Amazon United Kingdom?: The niche generates £538K/yr across 12 tracked products. 90-day search growth is -11.4%. Flapen's verdict: Skip it (44/100).
How competitive is the a5 envelopes niche?: 8 brands and 50 sellers compete. The top 5 products take 81% of clicks and top 5 brands hold 93% of demand.
What do buyers complain about in a5 envelopes?: Top complaints mined from reviews: Quality-Overall, Thickness, Adhesion/Stickiness. The return rate is 0.2%.
When does demand for a5 envelopes peak?: Demand peaks in Dec; the busiest month runs 1.8× the quietest.
What does it cost to enter the a5 envelopes niche?: Listings span £3.23–£19.10; the average listing price is £7.81 (sweet spot $15–$100). The average incumbent carries 2,026 reviews — the moat a new listing must climb.