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Blue Mailing Bags – Premium Strong Self-Seal Postal Bags for Stylish E-commerce

Blue Mailing Bags combine strength, protection and a neat professional look. Each bag is made from 60 µm co-extruded LDPE, 100 % recycled (code 4), and built for daily e-commerce orders. They’re moisture-proof / water-resistant, fully opaque for privacy and come with a tamper-evident self-seal strip.

The bright blue finish gives parcels a calm, reliable look that appeals to both boutique and corporate brands. Trusted by UK sellers on eBay, Amazon and Etsy, these eco mailing bags keep postage low and presentation sharp – without the cost of custom print.

Shop the Blue Mailing Bags Assorted Pack for a ready mix of popular sizes, or browse single sizes below. Also see: All Mailing BagsDocument WalletsPackaging TapeCardboard Boxes.


Which Blue Mailing Bag Size Do I Need?

Size Metric (mm) Typical Use
10×14″ 254×355 Books, T-shirts, accessories
12×16″ 305×406 Hoodies, jeans, small gifts
15×18″ 381×457 Jackets, multi-item apparel
17×22″ 432×559 Bedding, coats, bulkier soft goods

Why Choose Blue Mailing Bags?

Blue mailing bags give a clean, professional look while protecting every order. They share the same 60 µm film strength and moisture-proof protection as our grey and coloured ranges, but deliver a cooler, more dependable tone – perfect for brands that want quality packaging without bright hues.

Eco & Materials

Made from 100 % recycled LDPE (code 4) and recyclable through supermarket soft-plastic collection points. These bags are not biodegradable or compostable, but their recycled content and lightweight build help cut packaging waste and transport carbon.

Packing & Postage Tips

  • Use the smallest size that closes flat – reduces postage bands.
  • Press out air for a tidy, letter-friendly shape.
  • Pad sharp box corners to prevent punctures.
  • Add a document wallet for invoices or labels.

Prefer a Different Colour?

If you’d like a change of tone, explore our Grey, Pink, Green or Purple mailing bag collections.

All colours share the same 60 µm recycled LDPE construction and self-seal design – so whichever you choose, your parcels stay protected, professional and planet-friendly.

Order today for fast UK dispatch and bulk discounts on trusted eco mailing bags.


FAQs – Blue Mailing Bags<

Helpful answers for sellers choosing strong, recycled blue mailing bags

Are blue mailing bags waterproof?

No – they’re moisture-proof / water-resistant, protecting against rain and splashes.

What sizes are available?

Four key sizes: 10×14″, 12×16″, 15×18″, 17×22″. All made from 60 µm recycled LDPE.

Are these bags recyclable?

Yes. They are LDPE code 4 and recyclable through many supermarket return schemes. Remove the glue strip first.

Who uses blue mailing bags most?

Popular with fashion brands, accessory stores, tech sellers and subscription services wanting neat, non-flashy packaging.

Are they tamper-evident?

Yes – the self-seal adhesive strip gives a permanent closure that shows any interference.

Are they suitable for Royal Mail?

Yes, the range fits standard Royal Mail small and medium parcel bands when packed flat.

How thick are they?

60 microns (0.06 mm) – strong enough for clothing and boxed goods.

Are they fully opaque?

Yes – contents remain private even under bright light.

How should I store them?

Keep flat between 13–21 °C, out of sunlight; let cold stock warm before sealing.

Can I print on them?

Yes, some customers apply stickers or thermal labels; custom printing may require specialist ink for LDPE surfaces.