Grey Mailing Bags 10×14" (254×355 mm) – A4-friendly, fast to pack, built for daily dispatch

Grey mailing bags 10×14" (254×355 mm) fit A4 items with room, make quick work of apparel orders, and keep postage weights low. The strong 60 µm LDPE film is moisture-proof and opaque for privacy, with a fast self-seal strip that helps busy packing benches stay efficient and tidy.

Need a different fit? See all sizes or browse the full Mailing Bags range. Prefer colour branding? Explore Coloured Mailing Bags.

Why this 10×14" size is a best-seller

Sitting just above A4, 10×14" gives spare room for a folded garment, a brochure pack, or an A4 folder with inserts—without tipping parcels into heavier weight bands. The neutral grey finish hides marks and contents, keeping parcels professional in appearance. Fits within Royal Mail Small Parcel guidelines, making it a reliable choice for e-commerce shipping.

Who it’s ideal for

• Apparel & merch: T-shirts, leggings, single lightweight jumpers, gym tops, kids’ clothing.
• Books & print: A4 brochures, photo books in sleeves, catalogues, planners, diaries.
• Beauty & accessories: boxed cosmetics, small gift sets, belts, caps, scarves.
• Stationery & craft: A4 pads, folders, pattern packs, small kits and components.
• Marketplace sellers: fast, clean packaging for high-turnover A4 orders.

Fit & packing guidance (choose the right size first time)

• Best fit: single tee, thin knit, A4 book with a sleeve, boxed cosmetics, stationery bundles.
• If it’s bulky: jumpers or stacked apparel may fit better in 12×16".
• If it’s slim: for document-only or very small apparel, try 9×12" to remove void space.
• Corner care: add a light wrap to inner boxes to reduce punctures at sharp edges.
• Flatten air: press out trapped air before sealing so labels sit flat and parcels stack neatly.
• Mailing bag size tip: This 10×14" bag fits comfortably within Royal Mail Small Parcel dimensions, helping you reduce postage costs on A4 orders.

Key benefits

• Self-seal, tamper-evident closure for rapid packing and fewer tape rolls.
• 60 µm co-extruded film helps resist tears and punctures during courier handling.
• Moisture-proof / water-resistant outer adds protection against rain and splashes in transit.
• Opaque grey keeps contents private and presents a clean, uniform look.
• Lightweight versus boxes—save on postage and storage space.
• Recyclable LDPE — please remove the glue strip before recycling.

Eco & Materials

Material: 100% recycled LDPE (resin code 4), co-extruded for strength and opacity. Recyclable in many UK soft-plastic schemes — please remove the adhesive strip first. These bags are not biodegradable or compostable.

Strength & Protection

60 µm co-extruded film is puncture- and tear-resistant and moisture-proof. The self-seal, tamper-evident adhesive forms a permanent bond once pressed, keeping contents secure from dispatch to delivery.

Storage & Performance

Store bags at 13–21 °C and out of direct heat or sunlight. Let cold stock acclimatise to room temperature before use to maintain adhesive performance.

Lightweight = Lower Postage

Our recycled LDPE mailers are exceptionally lightweight, helping you keep parcels in lower weight bands versus boxes — a simple way to cut postal costs without losing protection.

Size comparison (pick the best fit for each order)

For mixed orders, keep 9×12" for slim items and 12×16" for bulkier picks. You’ll save postage and reduce re-packing.

Packing tips to save time and reduce damages

• Use a light inner sleeve for dusty or powder-prone items.
• Fold garments flat; avoid hard creases that create sharp corners.
• Apply labels on a smooth, clean area; press firmly for reliable scanning.
• Add invoices/returns in a clear document wallet on the outside.

Buying guide: choosing the right grey mailing bag size

Picking the correct mailing bag helps reduce costs and improve presentation. A 9×12" bag suits A4 papers, magazines or single T-shirts, while a 10×14" size is ideal for thicker books, jumpers or padded apparel. For bulkier orders, step up to 12×16" to stay within Royal Mail Small Parcel limits. Always flatten air before sealing and store bags flat to keep adhesive performance high.

Build a complete packing setup

Team your grey mailing bags 10×14" with packaging tape for inner cartons, Document Wallets for paperwork, and cardboard boxes when rigid protection is needed. For more colours and sizes, see the full Mailing Bags collection.

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