Mail bags

Buy now from a huge range of best value mail bags - the tough, light, waterproof polythene solution to all your mailing needs.

Mail bags are polythene envelopes used as an alternative to regular paper envelopes to send items in the post or by courier mail. Polythene mail bags, also known as mailing bags, plastic mailers or poly mail envelopes are an improvement on regular envelopes as they are strong, lightweight and waterproof, meaning greater protection for the contents they carry. Available in a range of colours, and with bubble-lined, heavy duty and security options, there is a mail bag out there for every mailing need.

Mailing bags are…

• Convenient for sending items in the post that require additional protection or are needed to carry a brand.
• Great at keeping package contents safe and dry during traditional mail or courier post.
• Also known as mailers, poly-mailers, plastic envelopes or mailorder bags
• Made from polythene to provide a perfect waterproof coating for your mail - much better than soggy envelopes!
• Very light which means that postage costs stay low
• Strong which means your envelope won’t tear or rip before it reaches its destination
• Similar in appearance to a regular envelope - rectangular and flat - and open in the same way, at one end to allow you to place your package contents inside
• Simple to use, with an adhesive strip running alongside the opening of the bag. Just fill the bag with your postage contents, rip off the covering tape, fold down the flap and your mailing bag is ready to post. Easy peasy!
• A great way to advertise your business. Get your company logo, design or slogan printed on the outside of the mailing bag and impress your customers as their mail lands on their doormat

What do the general public say about mail bags?

Baby Blue Mailing Bags

Blue mailing bags are a practical selection when despatch requirements to see tidy without adding cost or weight. The colour can give a softer, cleaner impression than plain black or grey film, which assists with presentation for clothing, gifts, and other light products that leave the warehouse by mail. A decent mailing bag also has to do above see tidy: it requirements enough gauge to resist splitting, a proper peel-and-seal strip, and film tension that retains the bag flat amid packing. If the bag closes properly and survives sorting, it saves time at the packing bench and cuts handling damage. That makes the stop useful only when the film still performs in transit.

6.5″ x 9″ Pink Mailing Bags – 165 x 230 mm

Pink mailing bags are a practical selection when light products need protection without adding much postage weight. The polyethylene film retains out damp and dirt, so clothing, books, and small electronics arrive in usable condition even when cartons would be overkill. Their low weight assists with carrier charges, while the adhesive strip speeds up sealing on a busy packing bench and reduces the chance of a bag opening in transit. Mixed colour spectrums, from grey and purple to blue, transparent, and white, can also assist with stock separation or simple order sorting. For plenty despatch areas, that combination makes a tidy, efficient mailing format.

Metallic mailing bags of this format are less about showroom novelty than disciplined package engineering: a compact 120 x 160 mm envelope in co-extruded polythene suppliers, specified to resist puncture from carton edges, blister packs and awkward select components, while maintaining a low tare weight that does not distort mailing banding or consignment yield. The peel-and-seal strip matters because closure failure is rarely dramatic; it is normally a matter of edge lift, fibre pollution on the stick line, or adhesive fatigue below fluctuating depot temperatures, all of which this style of permanent seal is designed to mitigate without secondary bagging. The metallised stop, for its part, is not merely decorativeits slick surface assists reduce scuffing in cage transit and assists a degree of opacity for stock that should not be readily identified on the sortation line. On the warehouse floor, that translates into cleaner select-face efficiency, steadier pallet presentation and less repacks caused by split outers. From a materials standpoint, the balance is frequently between gauge, tear propagation and melt-flow consistency amid conversion; proceed also light and the seams become the weak point, proceed also heavy and volumetric efficiency suffers. Where the structure remains predominantly mono-material polythene suppliers, the pack also sits more adequately within current recyclability expectations, which is increasingly relevant as packaging decisions are judged not simply on first-trip performance, nevertheless on the amortised energy tied up in all unit dispatched.

Mailers Plastic Envelopes Shopping

Plastic envelopes are often chosen because they give light products a low-cost outer layer without adding much bulk, nevertheless the proper value relies on how well the gauge, seal and handling match the job. A flimsy mailer may save a fraction on material, yet it can split in transit, let in moisture or see poor when it reaches the sorter or client. A better-specified poly bag retains paperwork, textiles or flat stock together, with self-seal closure helping speed on the packing bench and reduce tape use. That makes the item easier to store, quicker to select and less likely to trigger claims for damage.

Biodegradable Poly Mailers - Great print and classy see

Poly mailers are optimal treated as a light nevertheless proper layer for items that do not need a rigid carton around them. Clothes, soft accessories, books and similar products can travel well in this format because the film takes up small space, retains weight down, and assists reduce shipping waste in the dispatch area. They also work neatly as an outer cover for mailer boxes, giving additional protection against scuffs, dust and light handling damage while the box does its main job of holding shape. That makes them a sensible selection where packing speed, low postage weight and tidy presentation all matter, as long as the contents are not likely to be crushed.

DLE EasyTrak Courier Bags

Courier bags in DLE size are a tidy selection when slim items need secure transit without excess bulk. The 130 x 240 mm format suits documents, cards, small parts and other narrow products that would rattle around in a larger mailer. A padded bubble building adds a layer of shock resistance, which assists reduce handling damage when parcels are sorted, stacked or dropped into bags and sacks. The two delivery options also matter at dispatch stage: a no-trademark route speeds simple drops, while trademark required gives more control where proof of delivery is needed. That kind of specification selection can save time at packing and cut avoidable claims later.

Compostable mailing bags give mail order parcels a better stop-of-life route than normal plastic, nevertheless the proper earn relies on utilising them in the proper waste stream. When a bag is manufactured to smash down below composting conditions, it can assist reduce the amount of mixed plastic left after despatch, which is useful for organizations trying to cut their environmental footprint without changing the all packing line. They still need proper ordering, storage, and transparent staff sorting, because a compostable bag sent into the gross recycling stream can create confusion rather than savings. Used with sensible waste control, they are a practical selection for organizations that want to lower landfill dependence without upsetting packing efficiency.

polythene suppliers mailers sit in a rather alternative bracket from fibre-based envelopes; the value lies not merely in weather resistance, nevertheless in the method a correctly specified film behaves below proper distribution stress. A mailer manufactured from high-density or co-extruded polythene suppliers with controlled micron gauging will resist edge-split propagation, tolerate secondary bagging where required, and maintain seal integrity even when the consignment is dragged across conveyour transfers or compressed in overfilled cages. That matters on the warehouse floor, where select-face efficiency and pallet stability are influenced as much by pack uniformity and tare weight as by outright strengthlighter mailers improve volumetric efficiency, yet still mitigate ingress from rain, dust and dockside grime. The trade-off, as ever, sits in specification discipline: also light a film invites puncture around sharp product corners; also heavy a structure inflates stockholding volume and material consumption without corresponding earn. The more sophisticated stop of the sectour has responded with mono-material formats that maintain recyclability, tighter melt-flow consistency for proper conversion, and surface treatments that reduce handling friction without compromising print or label stickiness; taken together, those details make polythene suppliers mailers a practical engineering selection rather than a simple substitute for a paper envelope.

Details about   Colour POLY MAILERS Shipping Envelopes Self Sealing Plastic Mailing Bags Couture

Plastic mailing bags are chosen for daily despatch work because they are light, fast to pack and easy to seal. A self-sealing strip saves time at the packing bench, while the flexible polythene suppliers body makes the bag simple to store and fast to select amid a busy dash of orders. Colour also matters, because it can assist with sorting, branding or separating alternative product lines without adding additional labels. The plain fact is that this kind of mailer suits low-bulk products that do not need rigid protection, nevertheless it still requirements the proper gauge and seal quality to avoid split seams and handling damage in transit.

Locking Mail Bags

Reusable material mail bags make sense when daily dispatches need to be handled again and again without wasting money on throwaway packaging. A superb bag does above transport mail; it has to stand up to loading, unloading, sorting benches and van runs without the seams giving method or the material wearing thin at the folds. An expandable gusset gives additional room when a consignment runs heavier than expected, which assists prevent overstuffing and split stitching. Webbed handles also improve grip and handling for sorters and drivers, and the briefcase-style shape makes movement through a mail room cleaner and safer. That kind of design pays back in less replacements and less handling damage.

Mailing bag types

A mailing bag is a polythene envelope used to send contents in the post, but the name covers a whole range of different products. Here are just a few of them:

Lightweight economy mailers - the original and (according to many) best mailing bag. A traditional polythene mailer with no bells or whistles - just a strong, waterproof and lightweight envelope that is very reasonably priced and perfect for you to send items to your clients or customers without breaking the bank.

Glossy blue mail order bags - the mailing bag that speaks business, these metallic blue mailers are guaranteed to give your company the edge and impress your customers. Popular with online traders and mail order companies alike, these mailers are strong and professional in appearance without costing the earth.

Extra tough mailing bags - for those occasions where you want a little bit of extra protection to the contents of your post, these heavy duty mailing bags are perfect for withstanding bumps, scrapes and bangs in transit. Don’t mess with the heavy mob - these mailers are strong, tough and ready to rumble!

Vibrant colourful mailing bags - when you want your mail to stand out from the crowd, what do you do? You send it in a radiant, eye-catching coloured mailer! Guaranteed to bring any package to life, these polythene mailers come in a range of vivid colours - including baby pink, eco green and vibrant purple - to brighten up your customers’ day!

High security mailing bags - if your mail requires an extra level of security then a range of high security mailers are available to give you added peace of mind. Extra thick opaque mailers - available in black or white - provide top secret content confidentiality, while tamper-evident mailers that show if someone has been interfering with your delivery.

Print your very own personalised mailing bags

Take your business to the next level with printed mailing bags personalised with your company logo or design.

This is an ideal way to promote your business as your mail is guaranteed to stand out from the crowd and you are reaching the consumer directly in their own home or office.

There are many ways that you can personalise your mailers - a simple logo, distinctive colour scheme or typeface, company catchphrase or advertising slogan, to name but a few - and ensure that your delivery doesn’t get lost in a pile of post, but really stands out from the crowd!

A firm favourite with retailers in the UK and all over the world, printed mailers have proved to strengthen brand identity and increase customer awareness, so make sure you take advantage of a simple way to give your business a boost.

Where to buy mailing bags

Mailing bag manufacturers and suppliers include:

Polythene Mailers
Polythene Mailers are specialists in polythene mailing bags, stocking a huge collection of waterproof mailers in a variety of styles, shapes and sizes and plain or printed with your own design. With free delivery to any UK address, this is the place to go for polythene mailers!
www.polythenemailers.co.uk

Mailing Bags
The UK's online home of mailing bags caters for all of your mailer needs. Check out their huge catalogue of mailing bags in every style from economy mailers to glossy blue mailorder bags. Also features a fantastic size guide so you know exactly what size mailing bag to buy.
www.mailingbags.co.uk

Mail Order Bags
The home of mail order bags - the lightweight, waterproof and tough plastic envelopes that provide the perfect way to send your mail. Select from a huge range from heavy duty postal bags to light jiffy bags.
www.mailorderbags.co.uk

Plastic Mailing Bags
Mailing Bags is a fantastic website selling a huge range of polythene mailers at very competitive prices. Order online from a range of clear and coloured mailers, with free delivery to any UK address.
www.mailingbags.co

Mailing Bag
Another great mailing bag website, which sells a huge range of bags and provides a comprehensive rundown of why mailing bags are the postal bag of choice for online retailers.
www.mailing-bags.co.uk

Buy Mailing Bags
Packed full of information on mailing bags - including a detailed description of each mailing bag type - along with a comprehensive list of where you can buy them, this is a serious mailing bag website.
www.buy-mailing-bags.co.uk

Plastic Envelopes
Discount Plastic Envelopes is a great source of information on mailing bags and plastic envelopes. Whatever type of mailing bag you need you can find out about it here, along with information on ISO envelope standards.
www.discountplasticenvelopes.com

Polythene Mailing Bags
Find out all about polythene mailing bags at this fantastic website, which tells you all about mailers and why you should use them. Also features a section on eco-friendly mailing bags for those people who want to keep an eye on the environment.
www.polythenemailersdirect.co.uk

Courier Bags
This website is the place to go to find out all about postal sacks, courier bags and polythene mailers. Featuring a great in-depth list of each type of polythene mailer to help you choose the right courier sack for you.
www.couriersacks.com

Bubble Mailers
Bubble mailers is home of bubble mailing bags. Featuring all you need to know on the lightweight, bubble-lined mailers used to protect delicate items, along with eco-friendly alternatives. Check it out today.
www.bubblemailers.org.uk

Mailing Envelopes
If you're trying to decide what sort of mailing envelope you need to meet your mailing needs, then Mailing Envelopes is the website for you. A great place to find out the right size of bag along with details on a range of mailing bags.
www.discountmailingenvelopes.com

Poly Mailers
A great website to buy and find out more about polythene mailing bags. Listing details of a range of poly mailers available, helping you choose the perfect bag for you before you buy.
www.polythene-mailers.co.uk

Cheap Mailing Bags
A treasure-trove of information for anyone looking to buy mailing bags. Containing all the information you need to know on any type of mailing bag and how to get the best discount prices, you need go no further than Discount Mailing Bags.
www.discountmailingbags.co.uk

Plastic Mailing Envelopes
Visit this website to find out more about mailing bags and where to buy them. Featuring loads of information on polythene and eco-friendly mailing bags and a range of other polythene packaging.
www.discountmailingenvelopes.co.uk

Plastic Mailing Bag
A great website for any organisation who posts out a range of stock and wants to do so in a professional manner. Mailing Bags Direct lists common applications for mailing bags, so that you pick the right bag for your company.
www.mailingbagsdirect.co.uk

Mail Order Bag
A great website if you're looking to buy, or simply find out more information about, mail order bags. With details of a range of mailers, from blue opaque mail order bags to high impact silver mailers, this site is mailorder bag heaven!
www.mailorder-bags.co.uk

What the internet says about mail bags

Biodegradable mailing bags work optimal when the all packing process is treated as part of the material selection, not as an afterthought. Soft products like clothing, textile samples, and lightweight accessories need a mailer that is tough enough for conveyour handling nevertheless still simple to seal cleanly at speed. If the gauge is also light, the bag can split at the fold or tear on a sharp edge; if it is also heavy, it wastes material and takes up more space in storage. The proper benefit comes when the bag matches the item size closely, retains film tension below control, and arrives looking tidy. That makes dispatch easier, reduces handling damage, and gives a more sensible result for recycling or composting routes.

Blue mailing bags are normally specified in metric, even when buyers still think in imperial sizes, and that matters when stock has to match packing stations and carrier rules. A bag that is only a small off size can slow down dispatch, leave also much empty space, or force overfilling that strains the seam and closure. Converting the specification properly assists warehouse staff select the proper bag for the item, retains secondary packing tidy, and reduces handling damage in transit. It also makes stock control easier because the same bag can be matched to alternative product formats without guesswork. Clear sizing saves time on the shop floor and cuts avoidable waste.

Pink mailing bags are chosen for simple despatch where light weight matters above a rigid carton. A bag size like 480 gives enough room for clothing, soft products or bundled shopping items, while still keeping postage costs down because the pack adds very small dead weight. The polythene suppliers film has to be robust enough to survive sorting, bagging and delivery handling without splitting at the seals or corners, which is where weak gauge normally shows up first. A superb mailing bag also speeds up packing because there is no taping, folding or additional null occupy, so the package line stays fast and tidy. That makes them a sensible option for high-volume dispatch work where speed and basic protection matter.

Download Two Metallic Mailing Bags Mockup Front View Yellowimages

Metallic mailing bags occupy an awkward nevertheless increasingly refined corner of the transit-packaging market: they are specified as much for barrier behaviour and presentation as for simple containment. In practice, the better-engineered formats are rarely metallic in any structural sense; they are more often co-extruded or laminated polythene suppliers buildings with a vapour-deposited stop that delivers the visual cue while keeping tare weight within sensible limits for package networks. That distinction matters on the warehouse floor, where gauge discipline, seal integrity and surface slip all influence select-face efficiency and line speed. A bag that runs also soft will deform below auto-bagging pressure; one with poor melt-flow consistency at conversion can manufacture uneven seals and needless secondary bagging after burst failures in the consignment stream. The more competent specifications balance puncture resistance with pallet stability, retain the pack cube low enough to maintain volumetric efficiency, and avoid overcomplicated mixed-material builds that frustrate mono-material recyclability. Static, often overlooked with glossy and metallised surfaces, can also become a nuisance in fulfilmentbags cling, stack poorly and misfeedso antistatic treatment or controlled surface resistivity is sometimes warranted, particularly where lightweight contents and high-throughput packing benches coincide. In that sense, the format is less about visual flourish than about disciplined materials engineering: enough optical effect to transport a superior stop, without forfeiting recoverability, transport economics, or the basic mechanical reliability expected of a mailing substrate.

5pcs Plastic Envelopes Document Folder Letter Transparent File Envelopes New OS

Plastic envelopes need to be chosen for the job they in reality transport out, not only for how they see on a screen. Clear PP folders are useful for office papers because they let contents be checked fast, nevertheless the practical value relies on film stiffness, edge finishing, and seal quality as much as on transparency. A thin, floppy sleeve may save material, yet it can curl, split at the corners, or scuff in transit if packed tightly in a dispatch box. Colour can also vary slightly between batches or displays, which matters when matching sets. Good specification control retains the product usable and reduces complaints.

Poly mailers in 2 mil gauge suit light parcels that need basic moisture protection and a tidy stop without adding much dead weight. The thin film retains mailing costs down and stores neatly on a packing bench, which assists when mailing high volumes of soft products like clothing or accessories. Even so, the material has limits: sharp edges, overfilled contents, or rough handling can split a bag fast, particularly if the seal line is weak or the film tension has been poorly controlled amid converting. A superb spec selection relies on the product shape and the journey, because the cheapest mailer is not frequently the one that survives dispatch intact.

Briefcase Style Courier Bags

Briefcase style courier bags in canvas suit consignments that need a smarter face and a sturdier transport than a plain mailer. The wider 22W x 16H x 6D shape gives room for documents, samples, or mixed presentation packs without forcing the load into a flat profile, which assists keep safe corners and edges amid handling. Canvas also gives more body than thin film, so the bag grasps its shape better on the packing bench and in transit. That makes label application easier, reduces distortion when stacked, and gives the package a more professional stop when it reaches the receiver. For practical dispatch work, that combination of capacity and structure can save a lot of handling trouble.

Mailorder bags sit at an awkward junction between packaging science and warehouse discipline; they are asked to keep safe a consignment through multiple handling stages while adding almost none in tare weight and occupying very small cube. That tension tells why serious operatours tend to focus less on headline thickness and more on the behaviour of the polythene suppliers itselfhigh-density or co-extruded blends with stable melt-flow consistency, tightly controlled micron-specific gauging and enough puncture resistance to survive conveyour transfers, cage loading and last-mile compression without forcing an oversised pack profile. On the floor, the practical earns are plain enough: cleaner select-face efficiency, less interventions in secondary bagging, and better pallet stability because stock does not bulge unpredictably below stretch wrap. The same technical logic now carries into stop-of-life considerations; mono-material formats are preferred where potential because they simplify recyclability, while downgauged films reduce resin consumption and amortised energy per packed unit, provided surface slip and seal integrity remain within tolerance. Even the more niche developmentsantistatic treatments for dust-prone products, opaque pigmentation for loss prevention, permanent hot-melt closures that resist tampering once the consignment leaves despatchstem from the same industrial reality: the bag is not merely a wrapper, nevertheless a precisely tuned component in a volumetric, mechanical and increasingly circular packing system.

Mailing Bags

Mailing bags need to do a simple job well: keep safe parcels, retain packing moving fast, and survive the rough treatment of sorting and delivery. A robust grey polythene suppliers bag is often chosen because it stays light, retains postage costs down, and still gives enough tear resistance for daily dispatch work. The self-seal strip saves time on the packing bench and assists avoid weak tape jobs that can peel open in transit. Having them in all sizes also makes stock control easier, because alternative consignments can be matched to the proper bag without wasted occupy or awkward overpacking. For busy e-commerce despatch, the proper mailing bag cuts handling damage and retains the flow proper.

Tear and puncture resistance in polythene suppliers mailers is not simply a matter of making the film thicker; on the packing bench and across the package network, performance is governed by how the polymer chains are oriented, the stability of the blend, and whether the gauging has been matched to the abuse profile of the consignment. A well-engineered mailer will use high-density or co-extruded structures to resist corner strike from boxed products, while retaining sufficient flex-crack tolerance to avoid splitting along fold lines amid secondary bagging and sortation. That balance has a direct logistical consequence: lower tare weight maintains volumetric efficiency and assists pallet stability, yet the film must still present proper seal integrity and a controlled surface slip so select-face efficiency is not lost to bags that cling, block or misfeed. There is also a circular economy calculation in the background, because mono-material polythene suppliers formats are easier to recover than mixed buildings, provided additives and print coverage do not compromise recyclability; the engineering aim, then, is not brute mass nevertheless melt-flow consistency, puncture propagation control and a level of durability that mitigates transit damage without embedding avoidable resin into the system.

Research & Resources

For more information on mailing bags and the different types available, plus details of how poly mailers are manufactured, please visit:

Goldstork: A free directory listing the best of the web, featuring carefully selected information on and websites specialising in mailing bags.

PlasticBags.uk.com: Free online directory specialising in polythene packaging. Contains useful articles and other resources, including a list of top mailing bags websites.

PackagingKnowledge: Read detailed information about mailing bags on this in-depth website dedicated to polythene packaging.