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iSOUL
Red Mailing Bags & Postage Bags – 6 Sizes (6x9 to 17x24 inch), Packs of 25 to 1000 – Strong Self-Seal Parcel Bags
£3.99
Red mailing bags – strong, self-seal postage bags in 6 sizes from 6 x 9 to 17 x 24 inch, in packs of 25, 50, 100, 200, 500 and 1000. Our red poly mailers are a bold, festive red that gets noticed on the doorstep – perfect for Christmas and Valentine's orders, gifts and eye-catching branding. Popular with Vinted, eBay, Etsy and Depop sellers and small businesses across the UK. Free UK delivery on every order.
Red postage bag sizes
| Size (inches) | Size (mm) | Best for |
|---|---|---|
| 6 x 9" | 152 x 229 mm | Jewellery, accessories and socks |
| 9 x 12" | 229 x 305 mm | T-shirts, tops and A4 documents |
| 10 x 14" | 254 x 356 mm | Dresses, jeans and folded clothing |
| 12 x 16" | 305 x 407 mm | Jumpers and hoodies |
| 14 x 20" | 356 x 508 mm | Coats and several items together |
| 17 x 24" | 432 x 610 mm | Bulky clothing and bedding |
Why choose iSOUL red mailing bags?
- Strong co-extruded polythene – tough and tear-resistant.
- Peel-and-seal closure – no tape needed; the permanent strip makes every parcel tamper-evident.
- Fully opaque – contents stay private.
- Water and dirt resistant – protects items from rain and grime in transit.
- Lightweight – keeps postage costs lower than boxes.
- Works with every courier – Royal Mail, Evri, DPD, Yodel, InPost and Vinted drop-off points.
Frequently asked questions
What size red mailing bag do I need for Vinted?
Most Vinted sellers use 10 x 14" for everyday clothing like dresses and jeans, 9 x 12" for T-shirts and tops, and 12 x 16" or larger for jumpers and coats.
Which pack size should I buy?
The 25 and 50 packs suit occasional sellers. Regular sellers usually choose 100, and the 1000 pack gives the lowest price per bag.
What's the difference between mailing bags, postage bags and parcel bags?
Nothing – mailing bags, postage bags, postal bags, parcel bags and poly mailers are all names for the same self-seal plastic bags used to post items.
Can I send them as a Royal Mail Large Letter?
The 6 x 9" and 9 x 12" bags can be, as long as the packed parcel stays within Royal Mail's Large Letter limits (353 x 250 x 25 mm, up to 750 g). Please check Royal Mail's current rules before posting.
Is delivery free?
Yes – UK delivery is free on every order, with no minimum spend.
Need a bigger quantity? Call or WhatsApp +44 7418 098951 for a bulk discount. See every size and pack in our red mailing bags range, or browse all mailing and postage bags.
Red Mailing Bags & Postage Bags – 6 Sizes (6x9 to 17x24 inch), Packs of 25 to 1000 – Strong Self-Seal Parcel Bags
£3.99
In stock - Ready to be shipped
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Product Description
Red mailing bags – strong, self-seal postage bags in 6 sizes from 6 x 9 to 17 x 24 inch, in packs of 25, 50, 100, 200, 500 and 1000. Our red poly mailers are a bold, festive red that gets noticed on the doorstep – perfect for Christmas and Valentine's orders, gifts and eye-catching branding. Popular with Vinted, eBay, Etsy and Depop sellers and small businesses across the UK. Free UK delivery on every order.
Red postage bag sizes
| Size (inches) | Size (mm) | Best for |
|---|---|---|
| 6 x 9" | 152 x 229 mm | Jewellery, accessories and socks |
| 9 x 12" | 229 x 305 mm | T-shirts, tops and A4 documents |
| 10 x 14" | 254 x 356 mm | Dresses, jeans and folded clothing |
| 12 x 16" | 305 x 407 mm | Jumpers and hoodies |
| 14 x 20" | 356 x 508 mm | Coats and several items together |
| 17 x 24" | 432 x 610 mm | Bulky clothing and bedding |
Why choose iSOUL red mailing bags?
- Strong co-extruded polythene – tough and tear-resistant.
- Peel-and-seal closure – no tape needed; the permanent strip makes every parcel tamper-evident.
- Fully opaque – contents stay private.
- Water and dirt resistant – protects items from rain and grime in transit.
- Lightweight – keeps postage costs lower than boxes.
- Works with every courier – Royal Mail, Evri, DPD, Yodel, InPost and Vinted drop-off points.
Frequently asked questions
What size red mailing bag do I need for Vinted?
Most Vinted sellers use 10 x 14" for everyday clothing like dresses and jeans, 9 x 12" for T-shirts and tops, and 12 x 16" or larger for jumpers and coats.
Which pack size should I buy?
The 25 and 50 packs suit occasional sellers. Regular sellers usually choose 100, and the 1000 pack gives the lowest price per bag.
What's the difference between mailing bags, postage bags and parcel bags?
Nothing – mailing bags, postage bags, postal bags, parcel bags and poly mailers are all names for the same self-seal plastic bags used to post items.
Can I send them as a Royal Mail Large Letter?
The 6 x 9" and 9 x 12" bags can be, as long as the packed parcel stays within Royal Mail's Large Letter limits (353 x 250 x 25 mm, up to 750 g). Please check Royal Mail's current rules before posting.
Is delivery free?
Yes – UK delivery is free on every order, with no minimum spend.
Need a bigger quantity? Call or WhatsApp +44 7418 098951 for a bulk discount. See every size and pack in our red mailing bags range, or browse all mailing and postage bags.
Recently Viewed Products
2.5% of all sales are donated to charity.
UK-based, VAT-registered company
Trusted by customers, 3M+ items delivered
Quality Checked, Warranty Included
- 5 stars: 186 (73%)
- 4 stars: 70 (27%)
- 3 stars: 0 (0%)
- 2 stars: 0 (0%)
- 1 star: 0 (0%)
Fantastic bags. The vivid red colour really makes an impression and the quality backs it up. Thick polythene, strong seal, waterproof. Customers have commented on how professional the packaging looks.
Thank you
These red postal bags are fantastic. The colour is vivid and professional. The seal works perfectly every time and the waterproofing is excellent. Perfect for making my business stand out.
Thank you
Love the bold red colour on these bags. They make my parcels instantly recognisable. The quality is excellent — thick, waterproof and with a secure tamper-proof seal. Highly recommend.
Thank you
Pretty good red mailing bags. The vivid colour is eye-catching and the self-seal strip is reliable. Slightly smaller than expected but they work well for my packaging needs.
Thank you
Love the bold red colour on these bags. They make my parcels instantly recognisable. The quality is excellent — thick, waterproof and with a secure tamper-proof seal. Highly recommend.
Thank you
Fantastic bags. The vivid red colour really makes an impression and the quality backs it up. Thick polythene, strong seal, waterproof. Customers have commented on how professional the packaging looks.
Thank you
These bright red bags are brilliant. The colour is bold and eye-catching — exactly what I wanted. The seal is reliable and they're completely waterproof. Will definitely keep buying these.
Thank you
Really good red bags. The colour is vivid and the quality is decent. Knocked a star because the red is slightly darker than in the photos, but still a great colour for branding.
Thank you
Love these bags. The bright red colour is stunning — really vivid and bold. I use them for my sports brand and they look fantastic. Strong self-seal strip and excellent waterproofing.
Thank you
Pretty good red mailing bags. The vivid colour is eye-catching and the self-seal strip is reliable. Slightly smaller than expected but they work well for my packaging needs.
Thank you
The vivid red shade is exactly what I needed for my brand. The bags are well made and the seal is super strong. Waterproof too. My customers always comment on the striking packaging.
Thank you
Brilliant red bags. The colour is bold and consistent across every bag. The self-seal strip grips firmly and the plastic is thick and durable. Great value for money. Will keep reordering.
Thank you
These red mailing bags are superb. The colour is striking and consistent and the quality is outstanding. Strong seal, thick plastic, fully waterproof. My customers love the bold packaging.
Thank you
Love the bold red colour on these bags. They make my parcels instantly recognisable. The quality is excellent — thick, waterproof and with a secure tamper-proof seal. Highly recommend.
Thank you
Nice red bags overall. The colour is a good bold shade and the bags are waterproof. The seal holds well. Would like more sizes but for what they are they're great value.
Thank you
Pretty good red mailing bags. The vivid colour is eye-catching and the self-seal strip is reliable. Slightly smaller than expected but they work well for my packaging needs.
Thank you
Happy with these red bags overall. Good quality, waterproof and the seal is strong. The bold red colour is great for my brand. Would be five stars if the plastic was a bit thicker.
Thank you
Brilliant red bags. The colour is bold and consistent across every bag. The self-seal strip grips firmly and the plastic is thick and durable. Great value for money. Will keep reordering.
Thank you
These red mailing bags are superb. The colour is striking and consistent and the quality is outstanding. Strong seal, thick plastic, fully waterproof. My customers love the bold packaging.
Thank you
These red mailing bags are absolutely eye-catching. The bold vivid colour makes my parcels stand out immediately. Quality is excellent — thick plastic, strong seal, fully waterproof. Perfect for my brand.
Thank you
Happy with these red bags overall. Good quality, waterproof and the seal is strong. The bold red colour is great for my brand. Would be five stars if the plastic was a bit thicker.
Thank you
These red mailing bags are superb. The colour is striking and consistent and the quality is outstanding. Strong seal, thick plastic, fully waterproof. My customers love the bold packaging.
Thank you
These red mailing bags are superb. The colour is striking and consistent and the quality is outstanding. Strong seal, thick plastic, fully waterproof. My customers love the bold packaging.
Thank you
Fantastic bags. The vivid red colour really makes an impression and the quality backs it up. Thick polythene, strong seal, waterproof. Customers have commented on how professional the packaging looks.
Thank you
These bright red bags are brilliant. The colour is bold and eye-catching — exactly what I wanted. The seal is reliable and they're completely waterproof. Will definitely keep buying these.
Thank you
These red mailing bags are superb. The colour is striking and consistent and the quality is outstanding. Strong seal, thick plastic, fully waterproof. My customers love the bold packaging.
Thank you
Fantastic bags. The vivid red colour really makes an impression and the quality backs it up. Thick polythene, strong seal, waterproof. Customers have commented on how professional the packaging looks.
Thank you
Fantastic bags. The vivid red colour really makes an impression and the quality backs it up. Thick polythene, strong seal, waterproof. Customers have commented on how professional the packaging looks.
Thank you
Our Information
Our Address
Unit A2, Harrison Trading Estate Longworth Street, Preston PR15DL
Got questions? Call us 24/7
+447418098951
+447418098951