Is large postage bags profitable to sell on Amazon United Kingdom?

The niche generates £416K/yr across 21 tracked products. 1 of 3 products launched in the last 360 days are still selling. 90-day search growth is -27.2%. Flapen's verdict: Skip it (44/100).

How competitive is the large postage bags niche?

9 brands and 15 sellers compete. The top 5 products take 57% of clicks and top 5 brands hold 89% of demand.

What do buyers complain about in large postage bags?

Top complaints mined from reviews: Quality-Overall, Thickness, Size-Overall. The return rate is 0.1%.

When does demand for large postage bags peak?

Demand peaks in Oct–Nov; the busiest month runs 2.1× the quietest.

What does it cost to enter the large postage bags niche?

Listings span £2.59–£8.10; the average listing price is £4.48 (sweet spot $15–$100). The average incumbent carries 4,867 reviews — the moat a new listing must climb.

large postage bags

Skip it

Prices mostly outside the sweet spot ($2.59–$8.10) — this niche doesn't clear our bar today.

Returns

Incredible0.1%

return rate — above 5% kills the launch gate

Conversion

Incredible13.2%

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

Market size

Good£416K

£416K/yr · 707K searches

Competition

Okay57%

top-5 click share — leaders hold, buyers still browse

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Brand share

Okay89%

top-5 brand share — brands hold most of the demand

Review moat

Bad4,866.71

avg incumbent reviews — the moat a new listing must climb

Avg price

Bad£4.48

avg listing price — sweet spot $15–$100

Growth

Bad-27.2%

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

Price range

Bad£2.59–£8.10

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

According to Flapen's Amazon United Kingdom niche tracking, large postage bags is a £416K/yr Amazon United Kingdom market (707K searches/yr). The top 5 brands hold 89% of demand. Demand peaks in Oct–Nov. Verdict: Skip it — 44/100.

Data updated Jul 21, 2026 · scored weekly · How we score niches

large postage bags market data

Units sold / yr: 80K–100K; avg 4,000–5,000/product
Revenue / yr: £358K–£448K; units × avg price
Conversion rate: 13.2%
Avg BSR: #9
Page quality: 0%
Prime: 100%
Sponsored: 90%
Out of stock: 6.7%
Avg brand age: 41 months
Avg seller age: 173 days

Competition & brand share

The top 5 products take 57% of clicks — established leaders, but buyers still shop beyond them.

Brands

9 rising

Sellers

Top-5 brand share

89%

Top 20: 100%

Top-5 click share

57%

Top 20: 99%

Open market

iSOUL31%
Paxfords21%
Double Dragon18%
JeeJaan12%
G4GADGET7%
Calzette5%
Open — no brand owns it (3 brands, 6%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -27.2% search growth over the last 90 days.

Peak months: Oct, Nov · busiest ÷ quietest = 2.1×

Open Trend

Top large postage bags 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 21 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

25 x Strong Large Grey Mailing Postal Postage Bags 17 x 24 Packaging Mailers [Use in Parcel Delivery Shipping Mail Package] [432mm x 610mm]

iSOUL£5.024.7★8,846 rev

Paxfords Large Postage Bags for Clothes 17x24- Extra Strong Packing Bags for Posting - Strong Self-Seal Packaging Postal Bags - Grey Recyclable Mailing and Shipping Mailers (5)

Paxfords£4.744.7★309 rev

Double Dragon 60 Mixed Size Self-Seal Mailer Bags | Tamper-Proof Plastic Packaging for Mailing Postage Shipping & Delivery | Grey (4 Sizes | Small to Large | 15 Each)

Double Dragon£3.184.3★13,980 rev

Double Dragon 25-Pack 17x24 Self-Seal Grey Large Mailer Bags |Self-Seal Shipping Envelopes | Strong Waterproof Tamper-Proof Polythene Packaging for Clothes Bedding & Parcels (Also for Storage)

Double Dragon£5.054.2★5,390 rev

Large Postage Bags for Clothes 22x30- Extra Strong Packing Bags for Posting - Strong Self-Seal Packaging Postal Bags - Grey Recyclable Mailing and Shipping Mailers (5)

Paxfords£5.094.7★143 rev

Newest

by launch date

25 x Strong Large Baby Pink Mailing Postal Postage Bags 17 x 24 Packaging Mailers [Use in Parcel Delivery Shipping Mail Package] [432mm x 610mm] Pink

iSOUL£5.8773 rev

4mo ago

Large Postage Bags for Clothes 22x30- Extra Strong Packing Bags for Posting - Strong Self-Seal Packaging Postal Bags - Grey Recyclable Mailing and Shipping Mailers (5)

Paxfords£5.09143 rev

7mo ago

Paxfords Large Postage Bags for Clothes 17x24- Extra Strong Packing Bags for Posting - Strong Self-Seal Packaging Postal Bags - Grey Recyclable Mailing and Shipping Mailers (5)

Paxfords£4.74309 rev

9mo ago

delka Mailing Bags Durable Pink Poly Mailer Bags Tear-Resistant Shipping Envelopes for Clothing Documents Strong Self-Seal Adhesive Waterproof & Lightweight (6x9 50PK)

delka£2.67556 rev

1y ago

125 Assorted Mixed Pink Mailing Poly Postal Self Seal Bags 5 Sizes 25 from Each iSOUL Extra Small to Large Postage Packaging Assorted Mailers Posting Shipping Post Parcels Package Bags

iSOUL£5.212,197 rev

1y ago

What buyers say about large postage bags

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

What buyers love

Size-Overall22%

“Good size bag”

Quality-Overall19%

“These bags are really good quality”

Value For Money16%

“Good price”

Strength11%

“Great strong bags”

Advertised Vs Actual Product6%

“As advertised”

Ease Of Use3%

“Easy to use”

Thickness3%

“Good thickness”

Durability3%

“very durable”

Adhesion/Stickiness2%

“They stick really well”

Color2%

“Love the colour”

What buyers complain about

Quality-Overall30%

“Cheap quality”

Thickness22%

“Not the thickest bags”

Size-Overall9%

“Too small”

Adhesion/Stickiness9%

“Tape wont stick”

Strength5%

“not at robust”

Material Quality3%

“the material is different”

Smell2%

“Horrid smell”

Value For Money2%

“Not worth the money AT ALL”

Durability2%

“breaks easy”

Advertised Vs Actual Product2%

“Inaccurate description”

Top return reasons

Size-Overall58%

Quality-Overall12%

Thin12%

Advertised Vs Actual Product2%

Smell2%

Thickness2%

Strength2%

Adhesion/Stickiness1%

Color1%

Functionality-Overall1%

Common questions

Is large postage bags profitable to sell on Amazon United Kingdom?: The niche generates £416K/yr across 21 tracked products. 1 of 3 products launched in the last 360 days are still selling. 90-day search growth is -27.2%. Flapen's verdict: Skip it (44/100).
How competitive is the large postage bags niche?: 9 brands and 15 sellers compete. The top 5 products take 57% of clicks and top 5 brands hold 89% of demand.
What do buyers complain about in large postage bags?: Top complaints mined from reviews: Quality-Overall, Thickness, Size-Overall. The return rate is 0.1%.
When does demand for large postage bags peak?: Demand peaks in Oct–Nov; the busiest month runs 2.1× the quietest.
What does it cost to enter the large postage bags niche?: Listings span £2.59–£8.10; the average listing price is £4.48 (sweet spot $15–$100). The average incumbent carries 4,867 reviews — the moat a new listing must climb.

large postage bags

large postage bags market data

Competition & brand share

Demand & seasonality

Top large postage bags search terms