Discontinued Stationary
No1A Grey Opaque Poly Mailers (10 x 14 + 2 in / 250 x 350 + 50 mm) — Secure, Professional Mailing Bags
These grey opaque poly mailers are designed for sending non-fragile items safely and discreetly through postal and courier networks. The opaque grey film helps conceal contents for privacy, while the lightweight polythene construction keeps postage weight down compared with boxes. This listing covers the No1A size format (commonly referenced as 10 x 14 + 2 inches, or 250 x 350 + 50 mm), supplied as a trade pack for busy dispatch environments.
Important: This product is marked as Discontinued Stationary on the product record. Availability may be limited to remaining stock.
Key Features
Opaque grey film (discreet shipping):
The grey opaque material helps prevent the contents being seen in transit, supporting customer privacy and reducing the temptation for tampering.
Lightweight polythene construction:
Poly mailers provide a strong, flexible outer layer without the bulk of cartons, helping reduce dimensional weight and storage space in the packing area.
Generous flap / lip allowance:
The “+ 50 mm” allowance provides extra length for closing and sealing, helping you achieve a neat, secure finish even with slightly bulkier soft goods.
Practical thickness for everyday dispatch:
Manufactured at 55 micron film thickness, balancing durability with cost-efficiency for routine e-commerce and trade shipments.
Consistent trade sizing:
Specified as 250 x 350 + 50 mm (also shown as 10 x 14 + 2), making it easier to standardise packing processes and select the right mailer for common order profiles.
Legacy code reference:
Previously referenced as 20G10, useful for customers matching historic purchase orders or internal SKU lists.
- Product: Grey Opaque Poly Mailers
- Size format: No1A (10 x 14 + 2 in) / 250 x 350 + 50 mm
- Film thickness: 55 microns
- Pack quantity: Trade pack (see variant/pack details on page)
- Previous code: 20G10
Typical Uses
- Clothing and textiles (t-shirts, tops, leggings, light knitwear)
- Soft accessories (scarves, caps, fabric items)
- Non-fragile boxed items that benefit from an extra protective outer layer
- Returns mailers for customers (where a lightweight, discreet bag is preferred)
- General e-commerce dispatch where privacy and speed of packing matter
No1A Grey Opaque Poly Mailers — Full Product Guide
Poly mailers are a staple of modern fulfilment because they are quick to pack, easy to store, and help keep shipping costs predictable. The No1A format is a popular mid-size option for soft goods and compact orders. Below is a practical guide to help you choose, use, and get the best performance from this mailer style.
How It Works
Poly mailers act as a protective outer envelope for goods that do not require rigid protection. You place the item inside, remove excess air, and seal the closure area. The bag then provides a barrier against light moisture, scuffs, and handling marks during transit. The opaque grey film also helps keep the contents private from dispatch to delivery.
For best results, match the mailer size to the product so there is enough room to insert the item without forcing it, while avoiding excessive empty space that can lead to snagging or a less professional presentation.
Materials and Construction
These mailers are made from polythene film at 55 micron thickness. Polythene is valued in packaging for its combination of flexibility and toughness. It resists tearing better than many paper-based alternatives when subjected to stretching and corner pressure, which is common in courier networks.
The grey opaque finish is intended to reduce visibility of the contents. This is particularly useful for consumer shipments where discretion is important (for example, fashion orders or branded goods).
The size is stated as 250 x 350 + 50 mm. The “+ 50 mm” indicates additional length typically used for the closing area (often referred to as a flap or lip). This extra allowance helps you fold and seal cleanly without compromising the internal usable space.
Floor Type Compatibility (Packing Bench & Warehouse Use)
Poly mailers are well suited to fast-paced packing environments:
- Packing benches: Smooth bench tops allow quick insertion and sealing with minimal snagging.
- Pick/pack stations: Lightweight packs are easy to store in racking or dispensers.
- Mobile packing trolleys: The compact nature of mailers makes them ideal for multi-order packing runs.
If your operation uses automated label applicators or high-volume workflows, ensure your sealing method and label stock are compatible with polythene surfaces.
Health and Safety
As with all plastic packaging, keep poly mailers away from babies and young children due to suffocation risk. In a warehouse setting, store packs neatly to avoid slip hazards from loose film. When opening mailers with blades, use appropriate safety cutters and cut away from the body to reduce injury risk.
If you are shipping items with sharp corners or protrusions, consider adding internal protection (such as a protective sleeve or additional wrap) to reduce puncture risk.
Ideal Applications and Use Cases
This No1A format is commonly chosen for:
- Fashion fulfilment: A clean, professional outer pack for garments and soft goods.
- Subscription and repeat shipments: Consistent sizing helps standardise packing time and materials.
- Trade dispatch: Sending parts, samples, or non-fragile items where a lightweight outer is sufficient.
- Returns processes: Providing customers with a simple, lightweight return option (where appropriate).
For fragile items, consider using a padded mailer or a box with void fill instead of a standard poly mailer.
Maintenance, Cleaning and Care
Poly mailers are supplied ready to use and do not require maintenance. To keep them in best condition:
- Store in a clean, dry area away from direct sunlight and heat sources.
- Avoid placing heavy loads on top of packs to prevent creasing or deformation.
- Keep away from sharp edges that could nick the film before use.
In busy packing areas, it can help to decant a working quantity to the bench and keep the remainder sealed in the original carton to reduce dust and handling.
Case Study (Example Workflow)
Scenario: A small-to-medium e-commerce retailer dispatches daily orders of clothing and accessories. They standardise on a small set of mailer sizes to reduce picking errors and speed up packing.
- Picking: Items are picked and folded to a consistent profile.
- Packing: The packer selects the No1A mailer for mid-size garments and inserts the item without forcing.
- Sealing: Excess air is pressed out, the closure area is folded/sealed, and the shipping label is applied flat.
- Outcome: Faster packing times, consistent presentation, and discreet delivery thanks to the opaque grey film.
This example illustrates how a reliable, standardised mailer can support efficiency and a professional customer experience.
Who Is It For?
- Online retailers shipping soft goods and non-fragile items
- Warehouses and fulfilment centres seeking fast, repeatable packing processes
- Businesses wanting discreet, opaque outer packaging
- Teams standardising packaging around common order sizes
Colours / Features Available
This product is specified as grey opaque. If your operation uses multiple colours for sorting or branding, check the wider category for alternative colours and finishes (where available).
Sizes Available
This listing is for the No1A size format shown as 10 x 14 + 2 and 250 x 350 + 50 mm. Sapphire product pages may represent multiple pack quantities or related variants; refer to the options on this page for the available pack configuration.
If you need a different mailer size for smaller or larger orders, consider selecting another size within the grey opaque poly mailer range to keep your packing process consistent.
Cross-reference: Previously 20G10.