Description
Our A3 mailing bag pack of 20 contains twenty 120gsm kraft paper mailing bags, each 450 x 350mm with a 120mm gusset and a 100mm flap. Two peel-and-seal strips let your customer reuse the bag for a return, and a tear strip makes opening easy.
Same bag, other pack sizes: pack of 50. A paper mailing bag is lighter and flatter than a box, which usually keeps postage down for clothing and soft goods.
A3 mailing bag pack of 20: specifications
| Size | 450 x 350mm + 100mm flap |
|---|---|
| Gusset | 120mm |
| Fits | A3 items, bulkier knitwear, shoe boxes |
| Paper | 120gsm kraft |
| Closure | 2 peel-and-seal strips (second for returns) |
| Opening | Tear strip |
| Pack quantity | 20 |
| Royal Mail | Royal Mail Small Parcel (up to 450 x 350 x 160mm) |
Good for: Jumpers, hoodies, jeans, shoes and A3 prints.
Which paper mailing bag size do I need?
Fold the item as you will post it, then pick a bag at least 20mm longer and wider; the gusset takes the thickness. Sizes in stock:
- A5 mailing bag: 229 x 162 x 40mm
- Paper mailer bag: 190 x 300 x 50mm
- Large letter mailing bag: 250 x 353 x 50mm
- A4 postage bag: 350 x 250 x 50mm
- Paper mailing bag for clothes: 255 x 415 x 75mm, 2-ply
- A3 postage bag: 450 x 350 x 80mm
- A3 mailing bag: 450 x 350 x 120mm
- Large paper mailing bag: 500 x 400mm
- Extra large paper mailing bag: 570 x 450 x 100mm
Compare every size in paper mailing bags.
Buying for a business, school or production?
We supply Vinted, Depop, eBay and Etsy sellers, small clothing brands, theatres and schools. If you post with this size regularly, contact us to ask about trade pricing.
A3 mailing bag pack of 20 FAQs
Will A3 fit?
Yes, A3 (297 x 420mm) fits inside 450 x 350mm, and the 120mm gusset takes bulkier items.
How do returns work?
Open along the tear strip; your customer reseals the bag with the second peel-and-seal strip.
How does it post?
Royal Mail Small Parcel (up to 450 x 350 x 160mm).
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