Grey Mailing Bags 13×19" (330×483 mm) are one of the most versatile mid-large sizes for UK e-commerce shipping. They offer generous space for folded apparel, boxed gifts, and A4+ documents while keeping postage weights low. Made from 60-micron co-extruded LDPE, these self-seal mailing bags are water-resistant, opaque, and recyclable — ideal for fast dispatch through Royal Mail Small Parcel and all major UK couriers.

Need a different fit? See all sizes or browse the full Mailing Bags range.

Why 13×19" is a UK best-seller

This mid-large format bridges the gap between 12×16" and 14×21", giving extra capacity for hoodies, jeans bundles, boxed apparel, gift sets and A4+ packs without tipping into heavier postage bands. Its neutral grey finish keeps parcels private and professional, resisting scuffs and marks through courier handling.

Who it’s made for

• Apparel & fashion: hoodies, tracksuits, stacked tees, jeans bundles.
• Shoes & accessories: compact footwear boxes, belts, scarves, caps.
• Home & textiles: cushion covers, towels, bedding, throws.
• Retail & subscription brands: beauty boxes, lifestyle kits, A4+ orders.
• Marketplace sellers: eBay, Amazon, and Shopify merchants shipping mixed-size orders daily.

Fit & packing guidance

• Best fit: hoodies, jeans, compact shoe boxes, multi-item clothing, boxed gifts.
• If it’s slimmer: step down to 12×16".
• If it’s bulkier: step up to 14×21".
• Corner care: pad inner box edges to reduce punctures.
• Press out air: remove trapped air so parcels stack neatly and labels adhere well.

Key benefits

• Self-seal strip — fast and tamper-evident closure.
• 60-micron co-extruded film resists splits, punctures, and scuffs.
• Water-resistant to protect orders in wet weather.
• Opaque grey — privacy and clean presentation.
• Lightweight — reduces postage costs versus boxes.
• Recyclable LDPE (code 4) — remove glue strip before recycling.

Eco & materials

Material: 100% recycled LDPE (code 4), co-extruded for opacity and strength. Recyclable in most UK supermarket soft-plastic schemes. Not biodegradable or compostable.

Strength & protection

60-micron film offers puncture and tear resistance. The self-seal adhesive forms a permanent bond, protecting parcels from opening or moisture during delivery.

Storage & performance

Store flat between 13–21 °C away from direct heat or sunlight. Let cold stock reach room temperature before sealing for best adhesive strength.

Size comparison (find the right fit)

Keep 12×16" for smaller apparel and 14×21" for larger items to reduce void space and optimise postage.

Packing tips

• Fold garments neatly; avoid sharp folds that strain the film.
• Use a light inner sleeve for dusty or powdered goods.
• Apply labels smoothly for reliable barcode scans.
• Add paperwork in a clear document wallet outside the bag.

Build a complete packing setup

Pair your grey mailing bags 13×19" with packaging tape for inner boxes, document wallets for invoices, and cardboard boxes for rigid shipping needs. For eco-coloured alternatives, see our Coloured Mailing Bags.

Buying guide: choosing between 12×16", 13×19" and 14×21"

If you’re sending hoodies, jeans or mid-weight boxes, 13×19" is the sweet spot. It offers more depth than 12×16" without oversizing postage bands. For A4+ documents or light parcels, 12×16" fits best. For stacked apparel or bulky boxes, move up to 14×21" to keep seals strong and avoid stretching.

Common searches

Grey postage bags • 13×19 mailing bag UK • A3+ grey mailers • waterproof mailing bag • recyclable postal bags • Royal Mail Small Parcel packaging • eBay parcel bags • bulk mailing bags