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

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

 

International Envelope Paper Sizes

 

規格短辺×長辺
(mm)
短辺×長辺
(インチ:in)
DL220 × 110 mm8.7 × 4.3 in
B4353 × 250 mm13.9 × 9.8 in
B5250 × 176 mm9.8 × 6.9 in
B6176 × 125 mm6.9 × 4.9 in
C3458 × 324 mm18 × 12.8 in
C4324 × 229 mm12.8 × 9 in
C5229 × 162 mm9 × 6.4 in
C6/C5229 × 114 mm9 × 4.5 in
C6162 × 114 mm6.4 × 4.5 in
C7/C6162 × 81 mm6.4 × 3.2 in
C7114 × 81 mm4.5 × 3.2 in
E4400 × 280 mm15.7 × 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.

 

 

 

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