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

The niche generates £141K/yr across 26 tracked products. 2 of 4 products launched in the last 360 days are still selling. 90-day search growth is -23.2%. Flapen's verdict: Skip it (42/100).

How competitive is the extra large postage bags niche?

13 brands and 21 sellers compete. The top 5 products take 56% of clicks and top 5 brands hold 81% of demand.

What do buyers complain about in extra large postage bags?

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

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

Listings span £2.59–£11.06; the average listing price is £5.29 (sweet spot $15–$100). The average incumbent carries 4,285 reviews — the moat a new listing must climb.

extra large postage bags

Skip it

Prices mostly outside the sweet spot ($2.59–$11.06) — this niche doesn't clear our bar today.

Returns

Incredible0.1%

return rate — above 5% kills the launch gate

Conversion

Incredible13.7%

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

Competition

Okay56%

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

Brand share

Okay81%

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

Market size

Okay£141K

£141K/yr · 193K searches

Quality gap

Okay4.6★

avg incumbent rating — lower means beatable quality

Review moat

Bad4,284.69

avg incumbent reviews — the moat a new listing must climb

Avg price

Bad£5.29

avg listing price — sweet spot $15–$100

Growth

Bad-23.2%

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

Price range

Bad£2.59–£11.06

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

According to Flapen's Amazon United Kingdom niche tracking, extra large postage bags is a £141K/yr Amazon United Kingdom market (193K searches/yr). The top 5 brands hold 81% of demand. Verdict: Skip it — 42/100.

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

extra large postage bags market data

Units sold / yr: 25K–30K; avg 750–1,000/product
Revenue / yr: £132K–£159K; units × avg price
Conversion rate: 13.7%
Avg BSR: #12
Page quality: 0%
Prime: 88%
Sponsored: 88%
Out of stock: 5.6%
Avg brand age: 41 months
Avg seller age: 174 days

Competition & brand share

The top 5 products take 56% of clicks — established leaders, but buyers still shop beyond them.

Brands

13 falling

Sellers

Top-5 brand share

81%

Top 20: 100%

Top-5 click share

56%

Top 20: 94%

Open market

12%

iSOUL21%
Double Dragon18%
JeeJaan18%
Paxfords13%
Calzette11%
G4GADGET7%
Open — no brand owns it (7 brands, 12%)

Demand

Weekly Amazon search volume, last 45 weeks — -23.2% search growth over the last 90 days.

Open Trend

Top extra 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 24 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

5 Extra Large Postage Bags 24x36 Calzette Strong Mailing Bags for Parcels

Calzette£5.134.6★6,127 rev

JeeJaan 5 Pcs of Large Grey Postage Bags 24 x 36 - 610 x 914 mm Grey Parcel Bags Extra Strong Polythene Mail Envelopes for Packaging Parcel Self Seal Poly Mailer Ideal for Shipping Purpose

JeeJaan£4.254.7★3,469 rev

Double Dragon 10-Pack Extra-Large 24x36 Grey Poly Mailer Bags | Self-Seal Shipping Envelopes | Strong Waterproof Tamper-Proof Polythene Packaging for Clothes Bedding & Parcels (Also for Storage)

Double Dragon£4.834.2★5,390 rev

Newest

by launch date

Large Postage Bags for Clothes Vinted - 25 Packs 17x24 Inch Mailing Bags Self Seal Waterproof Parcel Bag - Heavy Duty Grey Poly Mailers for Packaging Shipping & Delivery - (432 x 610 mm)

LIVERPOOL ENTERPRISES LTD£5.96676 rev

3mo ago

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

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

Switory Parcel Bags Mailing 17x24 Inch Postal Bags Self Seal Waterproof Shipping Mailers Mailing Bag for Clothes Envelopes Postage Bag for Packaging 50Pcs (Grey)

Switory£7.90149 rev

1y ago

Switory Large Parcel Bags 17x24 Inch Large Postage Bags Self Seal Waterproof Shipping Mailers Mailing Bags for Clothes Envelopes Postal Bags for Packaging 25Pcs (Grey)

Switory£5.59149 rev

1y ago

What buyers say about extra 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 Money15%

“Good price”

Strength13%

“Great strong bags”

Advertised Vs Actual Product6%

“As advertised”

Durability3%

“They are durable”

Thickness3%

“Good thickness”

Ease Of Use3%

“Easy to use”

Adhesion/Stickiness2%

“Strong adhesive”

Storage Capacity1%

“Biggest size has a large capacity”

What buyers complain about

Quality-Overall29%

“Cheap quality”

Thickness16%

“Not the thickest bags”

Size-Overall10%

“Too small”

Adhesion/Stickiness10%

“The self stick adesive is very poor”

Strength6%

“Not strong”

Material Quality3%

“Very cheap material”

Durability3%

“They broke very easily”

Smell3%

“very strong smell”

Value For Money3%

“overpriced”

Advertised Vs Actual Product1%

“Not as advertised”

Top return reasons

Size-Overall56%

Quality-Overall14%

Thin8%

Strength4%

Smell3%

Value For Money2%

Advertised Vs Actual Product2%

Functionality-Overall2%

Defective Material/Parts2%

Material Quality1%

Common questions

Is extra large postage bags profitable to sell on Amazon United Kingdom?: The niche generates £141K/yr across 26 tracked products. 2 of 4 products launched in the last 360 days are still selling. 90-day search growth is -23.2%. Flapen's verdict: Skip it (42/100).
How competitive is the extra large postage bags niche?: 13 brands and 21 sellers compete. The top 5 products take 56% of clicks and top 5 brands hold 81% of demand.
What do buyers complain about in extra large postage bags?: Top complaints mined from reviews: Quality-Overall, Thickness, Size-Overall. The return rate is 0.1%.
What does it cost to enter the extra large postage bags niche?: Listings span £2.59–£11.06; the average listing price is £5.29 (sweet spot $15–$100). The average incumbent carries 4,285 reviews — the moat a new listing must climb.

extra large postage bags

extra large postage bags market data

Competition & brand share

Demand

Top extra large postage bags search terms