Grey Mailing Bags 10×14″ inch (250x350mm) 200 Bags Per Pack

The 10×14 inch grey mailing bag (250×350mm) is a standard large-letter poly mailer designed for secure UK shipping. These grey poly bags are made of durable polyethylene film, offering a waterproof, tear-resistant enclosure. Each bag features a strong self-seal adhesive strip for tamper-proof closure, ensuring parcels arrive intact. The opaque grey color hides contents for privacy and typically indicates recycled material. These mailers come in bulk packs (commonly 100 per pack) and are ideal for e-commerce shipments of clothing, books, accessories, and small goods.

Grey mailing bags combine cost-effectiveness with high performance. They weigh very little, reducing postage costs, yet withstand rough handling. For example, one UK supplier notes: “Our grey mailing bags are strong, durable, opaque, and waterproof”, made from extra-strong 50–60 micron polythene. The 10×14 size (approximately 254×356mm) is slightly larger than A4 (210×297mm) and can hold bulky items like folded shirts or multiple small products. Users often compare it to a standard 10×13 mailer; the 10×14 offers that bit more room, making it a versatile choice for parcels.

Key Features and Benefits:

• Durable Poly Material: Made of thick polyethylene (typically 50–60µ), these bags resist tears and punctures. They protect contents from dirt and moisture. Retailers describe them as “tear-resistant, waterproof poly bags”. A peel-off self-adhesive strip provides a tamper-evident closure, eliminating the need for tape.

• Waterproof & Weatherproof: The mailers are 100% moisture-resistant and waterproof, safeguarding items from rain or spills during transit. For example, Tesco notes its 10×14 envelopes are “extremely strong, reliable and waterproof,” preventing damage from bad weather.

• Secure Shipping: Once sealed, the heavy-duty bags are hard to reopen. This makes deliveries tamper-proof. Grey poly mailing bags often use a permanent “peel-and-seal” strip. As one supplier explains, the self-seal strip makes bags “very hard to open, allowing your items to arrive safely without risk of opening or tampering”.

• Eco-Friendly Material: Many grey mailing bags are partially recycled. For instance, one product is made from 30% raw, 70% recycled material. They are recyclable themselves (high-density polyethylene). Grey mailing bags often incorporate post-consumer recycled plastic without sacrificing strength. Eco options (biodegradable or recycled PE) may also be available.

• Cost-Effective & Lightweight: These poly mailers weigh only a few grams each, keeping postage costs low. Buying in bulk yields further savings. For example, ePackaging Direct offers 10×14 grey mailers in packs from 50 up to 10,000 units, with price per bag dropping substantially at higher quantities.

• Opaque Privacy & Branding: The neutral grey color conceals contents, which can deter pilfering. Grey mailers look professional and can be easily printed or labelled. They provide a clean exterior for shipping labels and logos without requiring a cardboard box.

Specifications: Typical 10×14 grey mailing bags have the following specs (approximate):

• Dimensions: 10″×14″ (≈254×356 mm)– large enough for A4 documents, clothing, or bulk items.

• Thickness: 50–60 micron (≈140–170 gauge). This range balances strength and flexibility. Thicker bags (up to 100μ) are available for heavier contents.

• Material: High-density polyethylene (HDPE) or low-density polyethylene (LDPE), often recycled content. Opaque gray.

• Closure: Permanent self-adhesive peel strip (tamper-evident, waterproof seal). No extra tape needed.

• Pack Sizes: Commonly sold in packs of 100, 250, 500, 1000, etc. Bulk pricing applies (e.g., per-thousand cost falls as quantity increases).

Why Choose 10×14 Grey Mailing Bags? Grey mailers are a popular UK shipping envelope choice for online sellers and businesses:

• Versatile Packaging: Suitable for clothing, catalogs, magazines, small electronics, etc. The strong material ensures even heavier contents arrive undamaged. E-commerce sellers (on eBay, Etsy, Vinted) often prefer 10×14 for apparel and textiles. These bags fit standard UK postal letter requirements while providing extra room.

• Weatherproof Protection: Grey poly mailers fully seal out moisture. Unlike paper or cardboard, they prevent water damage – ideal for UK’s rainy climate. One supplier highlights 100% moisture resistance and waterproof bags.

• Professional Look: The sleek grey finish adds a professional touch. Plus, many grey mailers have a black interior to further conceal items. They can be printed with branding or custom stickers.

• Environmental Credentials: Using recycled-content grey bags can enhance your sustainability profile. Many products are marketed as recyclable postal bags (ODP-approved) and meet standard UK environmental packaging guidelines.

Packaging and Shipping Guidelines:
When using 10×14 mailing bags, avoid exceeding weight limits (typically up to 500 g–1 kg, depending on thickness). Overstuffed bags may burst at seams. Securely press the self-adhesive strip for a strong seal. These bags are designed for courier and Royal Mail large letter use. For very fragile items (e.g. glass), additional padding is recommended. Always label the bag clearly with address labels; the smooth surface works well with thermal labels or markers.

Related Products: In addition to 10×14, we offer other postal bag options for UK businesses:

• Assorted Grey Mailing Bags (5 Sizes): A mixed pack with 125 grey mailers (5 sizes from 5×7″ up to 12×16″). Great for diversified shipping needs – see our [125 Assorted Grey Mailing Bags – 5 Sizes].

• Grey Mailing Bags (Various Sizes): Multiple quantities of grey poly mailers in sizes from 6×9″ to 14×17″ – check out our [Grey Mailing Bags – Strong, Waterproof & Eco-Friendly] collection.

• Blue/White Mailing Bags: For contrast, we stock coloured poly mailers (e.g. metallic blue) in 10×14″ and other dimensions. These are also tear-resistant and self-sealing.

• Polythene Postal Bags: Explore our range of LDPE postal bags, bubble mailers, and cardboard envelopes for different types of shipments.

FAQs:

• What exactly is a 10×14 grey mailing bag?
  It’s a poly mailer envelope measuring about 10 by 14 inches (≈254×356 mm). Made of durable polyethylene with a peel-off seal, it’s designed for postage. Grey mailing bags are lightweight yet strong, and are a common size for UK shipping of clothes, documents, books, and small items.

• How strong and durable are they?
  Very strong – the poly material (50–60 micron thick) resists tearing and punctures. Suppliers emphasize they are “strong, durable, opaque, and waterproof”. The self-adhesive strip creates a tamper-proof closure. For extra security, these bags are 100% moisture-resistant, so contents stay dry.

• Are 10×14 mailers waterproof?
  Yes. Grey mailing bags are fully waterproof and moisture-resistant. They are made of plastic that repels rain and snow, unlike paper envelopes. This means even if a parcel is exposed to bad weather, the contents remain protected (as noted on similar products: “waterproof… items placed within the bag will not be damaged by … weather”).

• How many bags come in a pack?
  Standard packs contain 100 pieces. We offer bulk quantities (100, 250, 500, 1000, 2500, etc.). Larger packs reduce cost per bag. For example, one seller offers packs from 50 up to 10,000 with the 1000-pack price dropping significantly.

• What items fit in a 10×14 bag?
  Many things! Common uses include folded clothing (tees, hoodies, underwear), soft goods, documents, magazines, small boxed items (if padded), and multiple smaller products. The size is popular for bulkier parcels. For instance, vendors often note these mailers are “ideal for small goods, clothing and parcels”. Large books or shoes may require bigger sizes, but lightweight fabric items fit comfortably.

• Is this size bigger than A4 or C4?
  A4 paper is 8.3×11.7″ – smaller than 10×14. The 10×14 mailer easily accommodates A4 with extra room. A C4 envelope is 9×12.8″ (roughly 229×324mm), which is slightly smaller, so 10×14″ is larger in at least one dimension. In short, 10×14 is a generous “Large Letter” size, often called A4+ in e-commerce packaging. For reference, the precise dimension is about 254×356 mm.

• Are these grey mailing bags recyclable?
  Yes, they are recyclable alongside other plastic bags (if facilities accept them). The polyethylene material (often LDPE) is 100% recyclable. In fact, many grey mailers use recycled plastic and are marketed as eco-friendly. We recommend reusing or recycling them when possible to reduce plastic waste.

• How do I know if an item will fit in a 10×14 bag?
  Measure the folded dimensions of your item. If it fits within 250×350 mm (about 9.8×13.8″), it will fit this mailer. Remember to account for some extra room to peel and seal the flap (flaps are usually 3–5cm). A good test is to gently place the item inside and check there’s enough space to seal without stretching.

For more shipping and packaging tips, and to explore our full range, visit our Mailing Bags category and related product pages.