Grey Mailing Bags 24×36" (610×914 mm) give very large capacity for duvets, pillows, bulk textiles, curtains, large soft goods and bigger 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 via UK soft-plastic schemes. At this size, most loads route as Royal Mail Large Parcel or with 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 brand colour? Explore Coloured Mailing Bags.
Why this 24×36" size?
When 21×24" or 20×26" run out of room, 24×36" adds the volume needed for very bulky textiles, large apparel bundles and big retail boxes — without the dead weight of a carton. Neutral grey looks tidy in transit, hides contents and suits any brand style across Shopify, eBay, Amazon and TikTok Shop.
Real use examples (what typically fits)
- Textiles & home: duvets, pillows, thick throws, blankets, curtain sets, large cushions.
- Apparel: heavy winter coats, bundled knitwear, multi-item apparel packs.
- Boxed goods: bigger gift sets, mid-to-large retail boxes (use corner pads).
- Fulfilment: bulk A4+/tabloid packs in sleeves, returns consolidation.
Fit & packing guidance
- Best fit: very bulky textiles, large soft goods, bigger boxed items.
- If it feels roomy: step down to 21×24" or 20×26".
- Corner care: pad or round inner-box edges to reduce punctures.
- Press out air: flatten before sealing so labels sit flat and sacks/totes stack cleanly.
Key benefits
- Fast self-seal, tamper-evident closure — no tape needed for most orders.
- 60 µm co-extruded film — resists tears, splits and scuffs on heavy loads.
- Moisture-proof / water-resistant protection for wet routes.
- Fully opaque grey — privacy and a clean, professional look on delivery.
- Lightweight — helps keep costs down versus rigid cartons.
- Recyclable LDPE (code 4) — remove the glue strip before recycling.
Eco & materials
Material: 100% recycled LDPE (code 4), co-extruded for strength and opacity. Recyclable at many UK supermarket soft-plastic return points. Not biodegradable or compostable.
Strength & protection
60 µm film gives dependable puncture and tear resistance on bulky shipments. The permanent adhesive forms a tamper-evident bond once pressed, protecting contents through warehouse and courier networks.
Storage & performance
Store flat at 13–21 °C away from heat/sunlight. Let cold stock reach room temperature before use for consistent seal strength.
Lightweight = lower postage
Mailing bags cut dead weight and reduce parcel size vs boxes. At 24×36", many shipments route as Royal Mail Large Parcel or via couriers; check service limits before dispatch.
Size comparison (choose the right bag)
| Size | Inches | Millimetres | Typical fit |
|---|---|---|---|
| Step down (height) | 21×24" | 533×610 mm | Pillows, throws, multi-item apparel |
| Step down (wider) | 20×26" | 508×660 mm | Wider boxed goods, large textiles |
| This page | 24×36" | 610×914 mm | Duvets, bulky textiles, larger retail boxes |
| Step up | 28×34" | 711×864 mm | Very large textiles, oversized soft goods |
Buying guide: 20×26", 21×24" or 24×36"?
21×24" is great for pillows and big apparel stacks. Choose 20×26" when your items are wider boxed goods. Pick 24×36" for very bulky textiles (duvets, blankets, curtains) or larger boxed items that don’t need a carton. For anything bigger, consider 28×34".
Common searches
24×36 mailing bags • extra-large 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 | 24x36 Inch (610x914 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 24×36" grey mailing bag?
Is 24×36" suitable for Royal Mail services?
Are these grey mailing bags waterproof?
Are 24×36" grey mailing bags recyclable?
How strong are they for heavy textiles?
When should I pick 24×36" over 21×24" or 20×26"?
Are the bags fully opaque for privacy?
Do I need extra tape with 24×36" bags?
How should I store 24×36" mailing bags?
Are these bags suitable for Amazon, eBay and Shopify orders?
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