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Median Technologies

Frequently Asked Questions

How long should my mailing take to complete?

Median aims to complete all mailings with 48 hours of receipt of all materials and approved documents.  In many cases projects are completed within one day. The volume of the mailing and the complexity of the production process will also determine the completion date.

Your Median Account Coordinator will provide project time lines upon request.    

Envelope sizes and types

Standard Envelope Specifications



  • B4 Envelopes 353x324mm
   No windows as standard
  • C4 Envelopes 229x324mm
  Barcode window size 38x95mm
Non Barcode window size 35x98mm
From left 26mm, 69mm from top
(Portrait – Opening on the long edge)
  • C5 Envelopes 162x229mm
   Barcode window size 38x95mm
Non Barcode window size 35x98mm
From left 21mm, 60mm from top
(Landscape – Opening on the long edge)   
  • DLX 120x235mm
   Barcode window size 38x95mm
Non Barcode window size 35x98mm
From left 32mm, 65mm from top
(Landscape – Opening on the long edge)
  • DLE 114x225mm
   Barcode window size 38x95mm
Non Barcode window size 35x98mm
From left 32mm, 65mm from top
(Landscape – Opening on the long edge)
  • C6 114x162mm
   Barcode window size 38x95mm
Non Barcode window size 35x98mm
From left 32mm, 65mm from top
(Landscape – Opening on the long edge)
  • DL 110x220mm
   Barcode window size 38x95mm
Non Barcode window size 35x98mm
From left 32mm, 65mm from top
(Landscape – Opening on the long edge)
  • 11B 90x145mm
   No windows as standard
(Landscape – Opening on the long edge)


C4 Envelopes are to be supplied as Peel and seal.
Please ensure envelopes supplied smaller than C4 are Lick and Stick type to ensure compatibility with machinery. 

Australia Post require Postage Paid Australia to be printed in the top right hand corner of the envelope and all pre-sort artwork guidelines to be conforming to achieve all possible postage rate discounts.

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