A handy reference guide of standard envelope sizes used in the print industry to help you plan for future print projects. 

          Click on image to download pdf

          Click on image to download pdf

D-Series envelope sizes

 All D-Series envelopes can hold an A5 folded in half
 
or an  A4  piece of paper folded into three panels.

DL Envelope Size 110mm x 220mm
 This is the most commonly used envelope.
DLX Envelope Size 120mm x 235mm
DLE Envelope Size 115mm x 225mm

C-Series envelope sizes

 C3 Envelope 324mm x 458mm
 Holds a full piece of A3 paper. 
 C4 Envelope 229mm x 324mm
 Holds a full piece of A4 paper. 
 C5 Envelope 162mm x 229mm
 Holds a full piece of A5 paper, or an A4 folded in half.
 C6 Envelope 114mm x 162mm
 Holds a full piece of A6, an A5 folded into half
 or an A4  folded in quarters

B-Series envelope sizes

 B4 Envelope 353mm x 250mm
 Best for holding newspapers.
 B5 Envelope 250mm x 176mm
 B6 Envelope 176mm x 125mm