Green Mailing Bags 12×16" (305×406 mm) – Eco Recycled Self-Seal Postal Bags for E-commerce Shipping
Green Mailing Bags 12×16" (305×406 mm) – Eco Recycled Self-Seal Postal Bags for E-commerce Shipping
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Green Mailing Bags 12×16" (305×406 mm) made from 60 µm, 100% recycled LDPE (code 4). These eco-premium self-seal postal bags are moisture-proof / water-resistant, fully opaque for privacy and built for daily dispatch. Trusted by eco-conscious brands and online sellers across the UK.
The sustainable, professional choice for medium parcels: reduce packaging waste, keep postage low and present a cleaner brand look without paying for custom print.
Not the size you need? See all sizes.
Why this 12×16" size?
12×16" is the most versatile “one bag fits most clothing” option. Compared with 10×14", it adds width and length so hoodies, jeans, joggers and gift sets fit without stretching seams. The fresh green colour signals your eco values while giving a tidy, professional finish on arrival.
Real use examples
- One hoodie or a pair of jeans (folded)
- Bundles of 2–3 T-shirts with tissue
- Small gift sets or retail boxes (pad sharp corners)
- Accessories, merch, beauty sets and subscription packs
Fit & packing guidance
Best internal fit up to approx. 285×380×60 mm. Choose the smallest bag that closes flat across the seal. If the adhesive lip lands on a bulge, step up to 15×18". For slimmer items, step down to 10×14". Press out excess air before sealing to keep parcels compact.
Key benefits
- Eco premium: 60 µm film made from 100% recycled LDPE (code 4)
- Moisture-proof / water-resistant for everyday courier handling
- Fully opaque green for privacy and a clean, sustainable look
- Fast peel-and-seal – permanent, tamper-evident bond, no tape needed
- Lightweight – helps reduce postage versus cartons
- Recyclable at carrier-bag return points (LDPE code 4)
Available pack sizes
Choose the right volume for your workflow:
- Pack of 100 – ideal for small sellers and trials
- Pack of 300 – steady weekly dispatch
- Pack of 500 – growing stores and multi-channel sellers
- Pack of 1000 – best unit cost for high-volume fulfilment
Specifications
| Size | 12×16" (305×406 mm) |
|---|---|
| Film thickness | 60 µm (standardised) |
| Material | LDPE (code 4), 100% recycled |
| Closure | Peel-and-seal, permanent bond |
| Colour | Green, fully opaque |
| Water protection | Moisture-proof / water-resistant |
| Recyclability | Return-to-store soft-plastic collection (LDPE code 4) |
Eco & materials
These mailers use co-extruded recycled film that balances strength with resource efficiency. Using recycled LDPE helps close the loop while delivering dependable tear and puncture resistance. Not biodegradable or compostable; please recycle via carrier-bag return schemes where available.
Strength & protection
At 60 µm, the film resists scuffs and handling damage better than economy grades. The permanent adhesive creates a tamper-evident seal that stays shut through sorting and last-mile delivery. The opaque green film protects buyer privacy.
Storage & performance
Store flat at 13–21 °C away from heat and sunlight. If stock arrives cold, allow it to reach room temperature before use for a consistent seal.
Lightweight = lower postage
Mailers cut dead weight versus boxes and help keep dimensions inside cheaper bands with Royal Mail, Evri and other couriers. Use a slim inner box or corner pads only when presentation or sharp edges require it.
Size comparison
| Option | Size (in + mm) | Typical fit |
|---|---|---|
| Step down | 10×14" (254×355 mm) | 2 tees, paperback, small boxed goods |
| This page | 12×16" (305×406 mm) | Hoodie, jeans, tee bundle, gift set |
| Step up | 15×18" (381×457 mm) | Jackets, bulkier knitwear, multi-item apparel |
Packing tips
- Fold garments to a neat rectangle; keep the seal area flat
- Press out excess air to reduce parcel size and weight
- Add card/bubble only for sharp corners or gift presentation
- Use a document wallet for external paperwork
Related sizes & essentials
Same colour sizes: 10×14" • 15×18"
Useful ranges: Mailing Bags • Document Wallets • Packaging Tape • Cardboard Boxes
Order today for fast UK delivery and sustainable, professional packaging.
Frequently Asked Questions
Are these green mailing bags environmentally friendly?
Yes. They are made from 100% recycled LDPE (code 4) and are recyclable at carrier-bag return points.
Are they waterproof?
They are moisture-proof / water-resistant, which protects against rain and damp during delivery. For fragile goods, add inner padding.
What fits in a 12×16" mailing bag?
Typical fits include a hoodie, jeans, 2–3 T-shirts or a small gift box. If the seal sits on a bulge, move up to 15×18".
Do I need extra tape?
No. The peel-and-seal adhesive forms a permanent, tamper-evident bond. Add tape only for very heavy or high-value items.
How should I store them?
Store flat at 13–21 °C away from heat and sun. Allow cold stock to acclimatise before use for a consistent seal.
Royal Mail 24 Tracked
Dispatched same day if ordered before 5 pm Monday to Friday. Please allow up to 1-2 days for delivery.
£1.99
DPD Next Day
Dispatched same day if ordered before 3 pm Monday to Thursday. Not available to Scottish Highlands & Islands.
£4.99
Free on orders over £100