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Dimensions of International Envelope Paper Sizes | DL, B4, B5, B6, C3, C4, C5, C6/C5, C6, C7

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Dimensions of International Envelope Paper Sizes | DL, B4, B5, B6, C3, C4, C5, C6/C5, C6, C7 Paper size
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International Envelope Paper Sizes

 

規格 短辺×長辺
(mm)
短辺×長辺
(インチ:in)
DL 220 × 110 mm 8.7 × 4.3 in
B4 353 × 250 mm 13.9 × 9.8 in
B5 250 × 176 mm 9.8 × 6.9 in
B6 176 × 125 mm 6.9 × 4.9 in
C3 458 × 324 mm 18 × 12.8 in
C4 324 × 229 mm 12.8 × 9 in
C5 229 × 162 mm 9 × 6.4 in
C6/C5 229 × 114 mm 9 × 4.5 in
C6 162 × 114 mm 6.4 × 4.5 in
C7/C6 162 × 81 mm 6.4 × 3.2 in
C7 114 × 81 mm 4.5 × 3.2 in
E4 400 × 280 mm 15.7 × 11 in

 

DL is a common envelope size from DIN 678-1 often with 90 mm × 45 mm address window in the lower left, which also fits ​13A4 well. Sometimes, it is erroneously labeled “DLE” instead, the E apparently standing for “envelope”.

 

The standard envelope sizes are defined by the international standard ISO 269. They are generally designed to be used with paper sizes that follow the ISO 216 standard. The most commonly used envelope sizes are from the C series. An A4 piece of paper will fit into a C4 envelope. The DL envelope has a different aspect ratio to the C series, which is why it does not appear in that series. The DL envelope is the most common envelope used in business. DL is short for ‘Dimension Lengthwise’, however it was previously known as DIN Lang in Germany where it originated in the 1920s. An A4 sheet of paper folded three times, parallel to its smaller sides, will fit into a DL envelope.

 

 

 

A series B series C series US sizes US Envelope
International Envelope Photography Paper Canadian Japanese Books
Newspaper Chinese Billboard Imperial Colombian
French Raw Transitional

 

 

 

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