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Grey Mailing Bags Assorted Pack – 100 Mixed (4.5x7 ″ to 13×19″) – Strong 60 µm Self-Seal Postal Bags for e-commerce Shipping

Size Guide

Grey Mailing Bags Assorted Pack – 100 Mixed (4.5x7 ″ to 13×19″) – Strong 60 µm Self-Seal Postal Bags for e-commerce Shipping
Product Title: Grey Mailing Bags Assorted Pack – 100 Mixed (4.5x7 ″ to 13×19″) – Strong 60 µm Self-Seal Postal Bags for e-commerce Shipping
Lowercase: grey mailing bags assorted pack – 100 mixed (4.5x7 ″ to 13×19″) – strong 60 µm self-seal postal bags for e-commerce shipping
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120x Grey Plastic Mailing Bags - 20 of Each Assorted Sizes

Grey Mailing Bags Assorted Pack – 100 Mixed (4.5x7 ″ to 13×19″) – Strong 60 µm Self-Seal Postal Bags for e-commerce Shipping

Size Guide

Grey Mailing Bags Assorted Pack – 100 Mixed (4.5x7 ″ to 13×19″) – Strong 60 µm Self-Seal Postal Bags for e-commerce Shipping
Product Title: Grey Mailing Bags Assorted Pack – 100 Mixed (4.5x7 ″ to 13×19″) – Strong 60 µm Self-Seal Postal Bags for e-commerce Shipping
Lowercase: grey mailing bags assorted pack – 100 mixed (4.5x7 ″ to 13×19″) – strong 60 µm self-seal postal bags for e-commerce shipping
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Show Cardboard Box: false
Regular price £8.99
Next Day Delivery
Same Day Dispatch

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Product Description

120 grey mailing bags across six practical sizes – the dependable, everyday choice for busy packing benches. You get 20 of each: 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). Each bag is made from 60 µm, 100% recycled LDPE (code 4) with a self-seal, tamper-evident closure. Moisture-proof / water-resistant and fully opaque for privacy.

Need a single size? See all Grey sizes.

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

This assorted pack gives you 20 of each size — six options to suit everything from small accessories to bulkier apparel.

Size Inches Millimetres Typical fit Qty Single-size page
XS 4.5×7″ 114×178 mm Jewellery, USBs, gift cards 20 4.5×7" page
Small 6.5×9″ 165×229 mm Phone accessories, small cosmetics 20 6.5×9" page
Small 9×12″ 229×305 mm A4 papers, single T-shirt, boxed beauty items 20 9×12" page
Medium 10×14″ 254×355 mm Books, A4 bundles, light knitwear 20 10×14" page
Medium 12×16″ 305×406 mm Hoodies, jeans, small boxes 20 12×16" page
Large 13×19″ 330×483 mm Joggers, bulkier apparel, large books 20 13×19" page


Why choose this mixed pack?

  • Versatile: six sizes handle nearly any daily order type.
  • Faster despatch: grab the right size instantly and seal in seconds.
  • Lower postage costs: lightweight 60 µm film keeps parcels in cheaper bands.
  • Smart, private finish: opaque grey film looks tidy and hides contents completely.

Key benefits

  • 60 µm co-extruded LDPE for puncture and tear resistance.
  • Moisture-proof / water-resistant exterior for protection in transit.
  • Self-seal adhesive for a tamper-evident, permanent bond.
  • 100% recycled and recyclable — remove glue strip before recycling.

Who uses these grey mailing bags?

Trusted by e-commerce retailers, marketplace sellers, and craft or boutique brands who value reliability and cost control. Perfect for apparel, accessories, books, stationery, beauty products and light boxed goods.

Fit & packing guidance

  • Measure carefully: width + depth ≤ bag width; length ≤ bag length.
  • Pad corners: round or cushion sharp edges on boxes.
  • Press out air: flatter parcels scan and stack better.

Mixed vs single-size packs

  • Choose this mixed pack if your order sizes vary or you’re testing demand.
  • Choose single-size packs for repeat items — cheaper per bag and quicker to pick.
  • Best workflow: keep this mixed pack plus your top-used size on the bench.

Bench workflow tips

  • Layout: arrange left-to-right from smallest to largest for fast access.
  • Test snugness: start small; move up only if seal strains.
  • Smooth corners and press air out before sealing.

Royal Mail fit guidance

Approximate packing guidance to help stay within Royal Mail parcel bands:

Size Typical use Band guidance*
4.5×7″ / 6.5×9″ Accessories, cosmetics Often Large Letter when flat
9×12″ / 10×14″ A4 items, T-shirts, books Usually Small Parcel
12×16″ / 13×19″ Hoodies, jeans, small boxes Small / Medium Parcel depending on depth

*Always confirm latest Royal Mail size and weight guidance for your service.

Why mailing bags beat boxes

  • Lighter: cut postage weight and save money.
  • Less space: store flat and ship more per batch.
  • Greener: fewer materials and lower carbon footprint.

Eco & materials

Material: 60 µm, 100% recycled LDPE (code 4). Recyclable in many UK film schemes (remove adhesive strip). Not biodegradable or compostable.

Storage & performance

Store between 13 – 21 °C and out of direct sunlight. Let cold stock acclimatise before use to maintain optimal seal strength.

FAQs

Can I change the size mix?

No — this fixed assortment includes six sizes (20 of each). For bulk of one size, use the individual product pages above.

Are all bags the same thickness?

Yes. Every bag in this pack is a consistent 60 µm for strength and reliability.

Are they waterproof?

They’re moisture-proof / water-resistant, giving reliable protection for normal courier routes.

Can I recycle them?

Yes. Made from LDPE (code 4) — recyclable through most UK film-recycling points. Remove the glue strip before recycling.

Build your full packing setup

Pair these with packaging tape, document wallets, and cardboard boxes. See all Mailing Bags to match sizes and colours.

Features
FAQs
Shipping

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

Reviews

Customer Reviews

Based on 96 reviews
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K
Kelli Marks
Neatly Packaged Order

The packaging was neat, and nothing was damaged – appreciated that.

R
Ryan Williamson
Spot On for Small Needs

Ordered 20 postage bags – just wanted a few, and they’re spot on.

C
C.N.

Quick delivery. Very strong ideal for mailing.
Would buy again.

P
Penelope
Repeat Order

Ordered a second batch – just as good.

L
Luke Myers
Great for Small Item Shipping

Grabbed 35 postage bags – worked perfectly for small items.