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The envelope is designed to make soft or flat products closed Tight in the envelope. So you can meet under 20mm thickness target easier, while other soft normal paper envelopes or poly mailing bags will just 'inflate' with a soft item inside. If you are after a rigid hard mailer, this is not one. If you need something to send you flat or soft products, this is an ideal one for cost and postage saving.
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Sizing
Inside: 160 x 240mm
Not sure? Use the size guide below or call us on (02) 8750 5347.










Yes. Rigid mailers are made from stiff board (700gsm card or corrugated eFlute), so prints, photos and documents arrive flat. For extra care, write "Please do not bend" on the front.
Our DL, C5 and C4 rigid mailers are sized to go inside the matching Australia Post prepaid envelopes. It's in the product title when a mailer is made to fit.
Peel the liner off the glue strip and press the flap down firmly.
Rigid mailers are made to resist bending. Card envelopes (tough bags) are strong 250–300gsm card that protects documents and catalogues but can flex a little.
The pack size is how many envelopes come in one pack, for example 100 is a pack of 100 envelopes. "Number of packs" sets how many packs you get, so a pack of 100 with 2 packs is 200 envelopes.
Yes to both. We offer 90-day returns on unopened items (see our refund policy), and you can choose pickup at checkout and collect from Minto NSW or Braeside VIC, Monday to Friday 9am to 4pm.
Order online and we'll usually have it ready in 15–30 minutes at either warehouse.
Talk to our team
Call us on (02) 8750 5347
Fast delivery Australia-wide
Via Australia Post and trusted couriers
Pickup in Sydney & Melbourne
Minto NSW and Braeside VIC
90-Day Returns
On unopened items