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iSOUL
Blue Mailing Bags & Postage Bags – 6 Sizes (6x9 to 17x24 inch), Packs of 25 to 1000 – Strong Self-Seal Parcel Bags
£3.99
Blue 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 and 1000. Our blue poly mailers are a smart, professional blue that suits menswear, kidswear, tech accessories and business orders. Popular with Vinted, eBay, Etsy and Depop sellers and small businesses across the UK. Free UK delivery on every order.
Blue 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 19" | 356 x 483 mm | Coats and several items together |
| 17 x 24" | 432 x 610 mm | Bulky clothing and bedding |
Why choose iSOUL blue 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 blue 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 blue mailing bags range, or browse all mailing and postage bags.
Blue 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
Blue 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 and 1000. Our blue poly mailers are a smart, professional blue that suits menswear, kidswear, tech accessories and business orders. Popular with Vinted, eBay, Etsy and Depop sellers and small businesses across the UK. Free UK delivery on every order.
Blue 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 19" | 356 x 483 mm | Coats and several items together |
| 17 x 24" | 432 x 610 mm | Bulky clothing and bedding |
Why choose iSOUL blue 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 blue 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 blue 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: 251 (71%)
- 4 stars: 100 (28%)
- 3 stars: 0 (0%)
- 2 stars: 1 (0%)
- 1 star: 0 (0%)
Nice blue bags. The royal blue is a good strong shade and the bags are waterproof. The seal holds well. Would love more sizes but these are great value.
Thank you
These royal blue mailing bags are absolutely gorgeous. The colour is rich and vivid — perfect for my professional brand. Thick plastic, strong seal and completely waterproof. Excellent purchase.
Thank you
Love these bags. The cobalt blue colour is stunning — deep and vibrant. I use them for my tech accessories brand and they look fantastic. Strong self-seal strip and excellent waterproofing.
Thank you
The royal blue shade is exactly what I needed for my brand. The bags are well made, waterproof and the self-seal strip is very secure. My customers love the professional blue packaging.
Thank you
The royal blue shade is exactly what I needed for my brand. The bags are well made, waterproof and the self-seal strip is very secure. My customers love the professional blue packaging.
Thank you
Fantastic bags. The vivid blue colour really makes an impression and the quality is excellent. Thick polythene, strong seal, waterproof. My customers always comment on the professional packaging.
Thank you
Really good royal blue bags. The colour is vivid and the quality is decent. Knocked a star because the blue is slightly lighter than in the photos, but still a lovely professional colour.
Thank you
Fantastic bags. The vivid blue colour really makes an impression and the quality is excellent. Thick polythene, strong seal, waterproof. My customers always comment on the professional packaging.
Thank you
Really good royal blue bags. The colour is vivid and the quality is decent. Knocked a star because the blue is slightly lighter than in the photos, but still a lovely professional colour.
Thank you
Love the rich royal blue colour on these bags. Instantly recognisable and professional-looking. Quality is excellent — thick, waterproof and with a secure tamper-proof seal. Highly recommend.
Thank you
Fantastic bags. The vivid blue colour really makes an impression and the quality is excellent. Thick polythene, strong seal, waterproof. My customers always comment on the professional packaging.
Thank you
Pretty good cobalt blue mailing bags. The 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
Absolutely love these cobalt blue bags. The colour is vivid and the quality is outstanding. The self-seal strip works every time and the bags are fully waterproof. Perfect for my brand.
Thank you
Good quality blue bags at a fair price. The colour is consistent and the seal works well. Slightly thinner than I'd like but good for most items.
Thank you
Fantastic bags. The vivid blue colour really makes an impression and the quality is excellent. Thick polythene, strong seal, waterproof. My customers always comment on the professional packaging.
Thank you
The navy blue is a gorgeous shade — smart and professional without being too bold. The bags are thick, the seal is tamper-proof and they're fully waterproof. Brilliant bags for my business.
Thank you
The royal blue shade is exactly what I needed for my brand. The bags are well made, waterproof and the self-seal strip is very secure. My customers love the professional blue packaging.
Thank you
Good quality blue bags at a fair price. The colour is consistent and the seal works well. Slightly thinner than I'd like but good for most items.
Thank you
Perfect blue bags for my brand. The colour is exactly as shown — deep royal blue. The self-seal strip works brilliantly and the bags feel substantial. Great purchase.
Thank you
Really good royal blue bags. The colour is vivid and the quality is decent. Knocked a star because the blue is slightly lighter than in the photos, but still a lovely professional colour.
Thank you
Absolutely love these cobalt blue bags. The colour is vivid and the quality is outstanding. The self-seal strip works every time and the bags are fully waterproof. Perfect for my brand.
Thank you
Nice blue bags. The royal blue is a good strong shade and the bags are waterproof. The seal holds well. Would love more sizes but these are great value.
Thank you
Fantastic bags. The vivid blue colour really makes an impression and the quality is excellent. Thick polythene, strong seal, waterproof. My customers always comment on the professional packaging.
Thank you
Pretty good cobalt blue mailing bags. The 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 rich royal blue colour on these bags. Instantly recognisable and professional-looking. Quality is excellent — thick, waterproof and with a secure tamper-proof seal. Highly recommend.
Thank you
Perfect blue bags for my brand. The colour is exactly as shown — deep royal blue. The self-seal strip works brilliantly and the bags feel substantial. Great purchase.
Thank you
Good quality blue bags at a fair price. The colour is consistent and the seal works well. Slightly thinner than I'd like but good for most items.
Thank you
These royal blue bags are brilliant. The colour is bold and eye-catching — exactly what I wanted. Reliable seal and completely waterproof. Will definitely keep buying these.
Thank you
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+447418098951
+447418098951