Grey Mailing Bags 28×34" (711×864 mm) give extra length and volume for curtains, long textiles, duvets, oversized pillows and large retail boxes while keeping parcels lightweight. Made from 60 µm co-extruded, 100% recycled LDPE, they’re moisture-proof / water-resistant, fully opaque for privacy and recyclable through UK soft-plastic schemes. At this size, most loads ship as Royal Mail Large Parcel or by couriers (Evri, DPD, Yodel) — check limits on the Royal Mail size guide.
Need a different fit? See all Grey sizes or browse the full Mailing Bags range. Prefer colour? See Coloured Mailing Bags.
Why this 28×34" size?
When 28×30" feels too short, 28×34" adds the extra length you need for curtains, long textiles and longer boxed kits. If you need more width instead of length, use 28×30". For a balanced large format, try 24×36".
Real use examples (what typically fits)
- Textiles & home: long curtains, drapes, duvet sets, oversized throws, bedding in sleeves.
- Soft goods: extra-long pillows, cushion sets, bulk fabric rolls or samples with inner wrap.
- Boxed goods: long retail boxes, kits and components with padded corners.
Fit & packing guidance
- Best fit: long textiles, large soft goods, elongated boxes with protective wrap.
- Need more width? Step across to 28×30".
- Need smaller? Step down to 24×36" or 21×24".
- Corner care: pad sharp box edges to prevent punctures.
- Press out air: flatten before sealing for cleaner labelling and stacking.
Key benefits
- Fast self-seal, tamper-evident closure — no tape required for most orders.
- 60 µm co-extruded film — resists splits, punctures and scuffs during courier handling.
- Moisture-proof / water-resistant protection against rain or damp.
- Fully opaque grey — privacy and a clean, professional delivery look.
- Lightweight — keeps postage costs lower than boxes.
- Recyclable LDPE (code 4) — remove the glue strip before recycling.
Eco & materials
Material: 100% recycled LDPE (code 4), co-extruded for opacity and durability. Recyclable at UK supermarket soft-plastic return points. Not biodegradable or compostable.
Strength & protection
The 60 µm recycled film gives strong tear and puncture resistance. The peel-and-seal adhesive forms a permanent, tamper-evident bond to secure contents in transit.
Storage & performance
Store between 13–21 °C out of direct sunlight. Let cold stock warm before use to maintain adhesive strength.
Lightweight = lower postage
Mailing bags reduce dead weight and cubic volume compared to boxes. At 28×34", shipments typically fall within Royal Mail Large Parcel or courier size ranges.
Size comparison (choose the right bag)
| Size | Inches | Millimetres | Typical fit |
|---|---|---|---|
| Smaller options | 24×36" / 21×24" | 610×914 / 533×610 mm | Pillows, bulky textiles, large boxes |
| Wider (shorter) | 28×30" | 711×762 mm | Very wide textiles, wide boxed goods |
| This page | 28×34" | 711×864 mm | Extra-long textiles, long boxed kits |
Buying guide: 28×30", 24×36" or 28×34"?
28×30" is perfect for wide duvets or bulky bedding. 24×36" offers balanced length and width for most large goods. Choose 28×34" when you need extra length for long textiles, curtains or rolled fabric goods that don’t suit cartons.
Common searches
28×34 mailing bags • extra-long grey poly mailers • waterproof postal sacks • recyclable mailing bags UK • Royal Mail Large Parcel packaging • bulk grey mailing bags • eBay and Amazon shipping bags
| Material | LDPE (code 4) |
| Size | 28x34 Inch (711x864 mm) |
| Color | Grey |
| Closure | Peel-and-Seal (Permanent) |
| Recyclability | Return to Supermarket Soft-Plastic Points |
| Thickness | 60 µm |
| Water Protection | Water-Resistant |
What fits in a 28×34" grey mailing bag?
Is 28×34" suitable for Royal Mail services?
Are these grey mailing bags waterproof?
Are 28×34" grey mailing bags recyclable?
How strong are they for long textile items?
When should I pick 28×34" over 28×30"?
When should I step down to 24×36"?
Are the bags opaque for privacy?
Do I need extra tape with 28×34" bags?
How should I store 28×34" mailing bags?
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