Standard Envelope Sizes

Format Dimensions (width x height) mm Dimensions (width x height) ins Content format
 B4  353 x 250
 13.9 x 9.8
 C4
 B5
 250 x 176
 9.8 x 6.9
 C5
 B6  176 x 125
 6.9 x 4.9
 C6
 C3  458 x 324
 18 x 12.8
 A3
 C4  324 x 229  12.8 x 9  A4
 C5  229 x 162
 9 x 6.4
 A5 (A4 folded in half once)
 C6  162 x 114
 6.4 x 4.5
 A6 (A4 folded in half twice)
 C7
 114 x 81
 4.5 x 3,2
 A7 (A6 folded in half)
 DL  220 x 110
 8.66 x 4.33
 1/3 A4
 E4  400 x 280
 15.75 x 11
 B4

 

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