Grey Mailing Bags 6.5×9" (165×229 mm) – compact A5 mailing bags made from tough 60 µm recycled LDPE. These self-seal postal bags are moisture-proof / water-resistant, fully opaque for privacy and quick to pack for daily e-commerce orders.
Grey Mailing Bags 6.5×9" (165×229 mm) – compact, quick to pack, everyday tough
Designed for efficiency, these 6.5×9" grey poly mailers give a snug A5 fit that keeps parcels tidy and professional. The co-extruded film balances strength with lightness, protecting small retail items while saving on postage. Ideal for sellers who pack fast and ship often.
Need a different fit? See all Grey sizes or browse the full Mailing Bags range. Prefer colour branding? Explore Coloured Mailing Bags.
Why this 6.5×9" (A5) size?
Great for A5+ packs, boxed accessories and small kits. The footprint reduces void space compared with 9×12", keeping postage costs down while still fitting small retail cartons, cosmetics and gift items.
Real use examples (what typically fits)
- Beauty & wellness: boxed skincare, serums, palettes, nail kits.
- Accessories: phone cases, cables, small tool sets, jewellery boxes.
- Stationery: A5 notebooks, cards, refills, sticker packs.
- Hobby & parts: components, craft supplies, hardware in inner sleeves.
Fit & packing guidance
- Best fit: A5 items, boxed cosmetics, small accessories, sample kits.
- Too tight? Step up to 9×12" for A4-friendly orders.
- Too roomy? Step down to 4.5×7" to cut void space.
- Corner care: use a light inner sleeve for sharp retail boxes.
- Press out air: flatten before sealing so labels sit flat and scan first time.
Key benefits
- Self-seal, tamper-evident closure for rapid packing.
- 60-micron co-extruded film helps resist tears, splits and scuffs.
- Moisture-proof / water-resistant outer for wet routes.
- Opaque grey for privacy and a clean, uniform look.
- Lightweight versus boxes — reduce postage and storage space.
- Recyclable LDPE — please remove the glue strip before recycling.
Eco & Materials
Material: 100% recycled LDPE (resin code 4), co-extruded for strength and opacity. Recyclable in many UK schemes — please remove the adhesive strip first. These bags are not biodegradable or compostable.
Strength & Protection
60-micron co-extruded film is puncture- and tear-resistant and moisture-proof. The self-seal, tamper-evident adhesive bonds fast to keep contents secure from dispatch to delivery.
Storage & Performance
Store bags at 13–21 °C and out of direct heat or sunlight. Let cold stock reach room temperature before use to maintain adhesive performance.
Lightweight = Lower Postage
These recycled LDPE mailers are exceptionally lightweight, helping you keep parcels in lower weight bands versus boxes — simple savings without losing protection.
Size comparison (pick the best fit)
| Size | Inches | Millimetres | Typical fit |
|---|---|---|---|
| Step down | 4.5 × 7" | 114 × 178 mm | Jewellery, A6 cards, small cosmetics |
| This page | 6.5 × 9" | 165 × 229 mm | A5 items, boxed accessories, sample kits |
| Step up | 9 × 12" | 229 × 305 mm | A4 with room, single tee, boxed cosmetics |
For flexibility, keep 4.5×7" for smaller items, and 9×12" for A4-friendly orders.
Packing tips to save time and reduce damages
- Use a simple inner sleeve for powder-prone items or sharp corners.
- Seal once — the adhesive is permanent and tamper-evident.
- Apply labels on a smooth area; press firmly for reliable scanning.
- Put invoices/returns in a clear document wallet on the outside.
Build a complete packing setup
Team your grey mailing bags 6.5×9" with packaging tape for inner cartons, document wallets for paperwork, and cardboard boxes when rigid protection is needed. See more colours and sizes in the Mailing Bags collection.
Common searches: grey poly mailers, A5 self-seal postal bags, opaque mailing bags, small parcel packaging.
| Material | LDPE (code 4) |
| Size | 6.5x9 Inch (165x229 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 6.5×9" grey mailing bag?
Are 6.5×9" bags suitable for A5 mailers?
Will the bag tear or split with boxed items?
Are these grey mailing bags waterproof?
Are the bags fully opaque for privacy?
Do they have a strong seal?
Are 6.5×9" grey mailing bags recyclable?
Any packing tips to keep postage costs down?
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