15x18 Inch Grey Plastic Postage Bags - Mailing Bags for Parcels
15x18 Inch Grey Plastic Postage Bags - Mailing Bags for Parcels
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Grey Mailing Bags 15x18 Inch
Our 15 x 18 inch grey mailing bags strike a perfect balance between medium and large sizes, offering flexibility for a wide range of packaging needs. Made from tough, puncture-resistant polythene, they provide excellent protection from weather, tears, and tampering.
The opaque grey design keeps contents private while giving a clean, professional appearance. A peel-and-seal adhesive strip saves time and removes the need for tape or labels. This size is especially popular for posting folded jeans, thick jumpers, boxed items, and documents in folders—perfect for online retailers and fulfilment teams that value efficiency and reliability.
Product Features
- Dimensions: 15 x 18 inches (381 x 457 mm)
- Material: Robust 50-micron polythene
- Seal: Reliable self-seal adhesive strip
- Protection: Waterproof and resistant to tears
- Use Cases: folded jeans, thick jumpers, boxed items, toys, towel sets, etc.
Grey Mailing Bags Size Guides
| Size Guide | Size in Inches | Centimetres | Compared to Paper Sizes | Best For |
|---|---|---|---|---|
| Small | 4.5x7 inch | 11.4 x 17.7 cm | Between A6 and A5 | Small jewelry, USB drives, gift cards |
| Small | 6.5x9 inch | 16.5 x 22.8 cm | Close to A5 | Socks, small cosmetics, phone accessories |
| Small | 9x12 inch |
22.8 x 30.4 cm |
Between A4 and A3 | T-shirts, magazines, documents (Royal Mail Large Letter Size) |
| Medium | 10x14 inch | 25.4 x 35.5 cm | Slightly smaller than A3 | Light jackets, books, larger documents |
| Medium | 12x16 inch | 30.5 x 40.6 cm | Close to A3 | Sweaters, jeans, medium plush toys |
| Medium | 13x19 inch | 33 x 48.3 cm | Larger than A3 | Hoodies, multiple clothing items, larger books |
| Large | 14x21 inch | 35.5 x 53.3 cm | Between A2 and A1 | Coats, bulkier clothing, small blankets |
| Large | 15x18 inch | 38.1 x 45.7 cm | Between A2 and A1 | Multiple garments, larger plush toys |
| Large | 17x24 inch | 43.2 x 61 cm | Close to A1 | Bedding sets, large textiles, posters |
| Extra Large | 20x26 inch | 50.8 x 66 cm | Between A1 and A0 | Large blankets, bulk clothing |
| Extra Large | 21x24 inch | 53.3 x 61 cm | Between A1 and A0 | Oversized garments, multiple items |
| Extra Large | 24x36 inch | 61 x 91.4 cm | Close to A0 | Large posters, art prints, bedding sets |
| Extra Large | 28x30 inch | 71.1 x 76.2 cm | Larger than A0 | Bulk textiles, large cushions |
| Extra Large | 28x34 inch | 71.1 x 86.4 cm | Larger than A0 | Oversized items, multiple large products |
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