Assorted Grey Mailing Bags – 120 Pack (6 sizes, 20 of each)

One mixed pack to cover everyday orders. You get 120 grey mailing bags across six popular sizes 4.5×7" (114×178 mm), 6.5×9" (165×229 mm), 9×12" (229×305 mm), 10×14" (254×355 mm), 12×16" (305×406 mm), 13×19" (330×483 mm) all made from 60-micron, 100% recycled LDPE with a tamper-evident self-seal. The film is moisture-proof (water-resistant) and opaque for privacy — ideal for busy benches and varied SKUs.

What’s in the pack (sizes, mm & typical fit)

Why choose a mixed pack?

• Right size on hand: reduce void space and re-packs.
• Faster packing: grab-and-go sizes speed up dispatch.
• Lower postage: lighter than boxes; pick the closest fit to stay in cheaper bands.
• Clean, private finish: opaque grey film hides contents and looks tidy.

Key features

• 60-micron co-extruded film — helps resist tears, splits and scuffs.
• Moisture-proof / water-resistant outer for wet routes.
• Self-seal, tamper-evident adhesive for a permanent bond.
• 100% recycled LDPE (resin code 4); recyclable — remove the glue strip first.

Who it’s for

Marketplace sellers, boutiques, and SMEs with varied SKUs: apparel & merch, beauty, stationery & print, craft kits, and small boxed goods.

Fit & packing guidance

• Measure: Item length ≤ bag length; item width + height ≤ bag width.
• Corner care: round or pad sharp inner-box edges.
• Press out air: flatten before sealing so labels sit flat and parcels stack cleanly.

Mixed vs single-size — which should you choose?

• Choose this mixed pack if your orders vary a lot in size, you’re starting out, or you want an all-rounder for a small team.
• Choose single-size packs if 70%+ of your items fit one size (e.g. 10×14"). It’s cheaper per bag and faster to pick.
• Best practice: keep this mixed pack plus your most-used single size on the bench so staff pick perfectly first time.

Bench workflow tips

• Left-to-right layout: smallest on the left to largest on the right; tape/document wallets above the scanner.
• Grab the snug fit: try the smaller bag first; move up a size only if the seal strains.
• Corner care: pad inner-box corners to prevent punctures.
• Press out air: flatter parcels scan better and stack better.

Royal Mail fit notes (general guidance)

These sizes can help you stay in common parcel bands when packed sensibly. Guidance only — final pricing depends on total dimensions, weight and service.

*Always check current Royal Mail sizing/weight guidance for your service.

Savings vs single-size packs

• Less void space: a closer fit reduces dimensional weight and returns.
• Lighter than boxes: 60 µm LDPE protects soft goods without carton weight.
• Fewer re-packs: fit it first time → faster benches, lower labour per parcel.

Common mistakes to avoid

• Overfilling: if the seal strains, step up one size.
• Sharp edges: pad box corners or use an inner sleeve.
• Trapped air: press out air before sealing; labels scan better.

Eco & materials

Film: 60 µm, 100% recycled LDPE. Recyclable in many UK schemes (remove adhesive strip). Not biodegradable or compostable.

Storage & performance

Store at 13–21 °C and out of direct heat/sunlight. Let cold stock acclimatise before use for best adhesive performance.

FAQs

Can I choose the sizes?

This mixed pack is fixed (six sizes, 20 of each). For more of one size, order the single-size page linked above.

Are all bags the same thickness?

Yes — each size in this pack is produced at 60 µm.

Are they waterproof?

They’re moisture-proof / water-resistant. For very wet routes, add an inner sleeve.

Are they recyclable?

Yes. They are LDPE (code 4) and recyclable in many UK schemes — please remove the glue strip first.

Build a complete packing setup

Pair with packaging tape, document wallets and cardboard boxes. Explore more in the Mailing Bags collection.