Grey Mailing Bags 28×30" (711×762 mm) give extra-wide capacity for pillows, bulky bedding, large cushions, curtains and wider retail boxes while keeping parcels lightweight. Made from 60 µm co-extruded, 100% recycled LDPE, they are moisture-proof / water-resistant, fully opaque for privacy and recyclable via UK soft-plastic schemes. At this width, most parcels ship as Royal Mail Large Parcel or with couriers like Evri and DPD — check the Royal Mail size guide for service limits.
Need a different fit? See all Grey sizes or browse the full Mailing Bags range. Prefer brand colour? Try our Coloured Mailing Bags.
Why this 28×30" size?
When 24×36" is too long but not wide enough, 28×30" gives the extra width for pillows, duvets, bulky textiles and wider retail boxes without moving to heavy cartons. For longer loads, step up to 28×34".
Real use examples (what typically fits)
- Textiles & home: pillows, duvets in sleeves, large throws, curtains, cushion sets.
- Apparel & kits: bulky clothing bundles, coats, multiple soft goods.
- Boxed goods: wide gift boxes, retail cartons, equipment with inner padding.
Fit & packing guidance
- Best fit: wide textiles, bulky soft goods, large boxed items with padded corners.
- Need more length? Step up to 28×34".
- Need less width? Step down to 24×36" or 21×24".
- Corner care: pad or round inner-box edges to avoid punctures.
- Press out air: flatten before sealing so labels sit flat and sacks/totes stack neatly.
Key benefits
- Fast self-seal, tamper-evident closure — no tape needed for most orders.
- 60 µm co-extruded film — resists splits, tears and scuffs during courier handling.
- Moisture-proof / water-resistant for reliable protection in wet weather.
- Fully opaque grey — hides contents and keeps parcels professional.
- Lightweight — saves postage compared with boxes.
- Recyclable LDPE (code 4) — remove the glue strip before recycling.
Eco & materials
Material: 100% recycled LDPE (resin code 4), co-extruded for durability and opacity. Recyclable at most UK supermarket soft-plastic return points. Not biodegradable or compostable.
Strength & protection
60 µm film provides excellent puncture and tear resistance on bulky goods. The peel-and-seal adhesive forms a strong, tamper-evident bond once pressed.
Storage & performance
Store flat between 13–21 °C away from heat or sunlight. Let cold stock acclimatise to room temperature before sealing for consistent adhesion.
Lightweight = lower postage
Mailing bags reduce dead weight and parcel volume compared with boxes. At 28×30", many shipments route as Royal Mail Large Parcel or by courier—ideal for large, soft or padded goods.
Size comparison (choose the right bag)
| Size | Inches | Millimetres | Typical fit |
|---|---|---|---|
| Smaller options | 21×24" / 24×36" | 533×610 / 610×914 mm | Pillows, bedding, multi-item apparel |
| This page | 28×30" | 711×762 mm | Very wide textiles, wide boxed goods |
| Step up (longer) | 28×34" | 711×864 mm | Extra-long textiles and larger boxes |
Buying guide: 24×36", 28×30" or 28×34"?
24×36" suits long but narrower goods. 28×30" is the go-to for very wide textiles, duvets and large retail boxes. Choose 28×34" when you need both width and extra length for oversized items or multiple soft packs.
Common searches
28×30 mailing bags • extra-wide 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 | 28x30 Inch (711x762 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 28×30" grey mailing bag?
Is 28×30" suitable for Royal Mail services?
Are these grey mailing bags waterproof?
Are 28×30" grey mailing bags recyclable?
How strong are they for heavy textiles?
When should I pick 28×30" over 24×36"?
When should I step up to 28×34"?
Are these bags fully opaque for privacy?
Do I need extra tape with 28×30" bags?
How should I store 28×30" 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