ISO 216 is the international standard for paper sizes, and includes sizes such as A4, A3, etc. Here is a list some the A, B and C series sizes, and also some common US paper sizes.
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ISO 269 C envelope sizes were introduced in 1985, and each numbered size is slightly bigger than it's "A" counterpart. For example, a C5 envelope will fit an A5 piece of paper without the need to fold it.
Size | millimeters | inches |
---|---|---|
C0 | 917mm x 1297mm | 36.1" x 51.1" |
C1 | 648mm x 917mm | 25.5" x 36.1" |
C2 | 458mm x 648mm | 18.0" x 25.5" |
C3 | 324mm x 458mm | 12.8" x 18.0" |
C4 | 229mm x 324mm | 9.0" x 12.8" |
C5 | 162mm x 229mm | 6.4" x 9.0" |
C6 | 114mm x 162mm | 4.5" x 6.4" |
C7 | 81mm x 114mm | 3.2" x 4.5" |
C8 | 57mm x 81mm | 2.2" x 3.2" |
C9 | 40mm x 57mm | 1.6" x 2.2" |
C10 | 28mm x 40mm | 1.1" x 1.6" |
Please note, all sizes may vary slightly, some by 1.5 - 3mm depending on size. Use the information on this site at your own risk - we cannot be held responsible for any loss due to inaccuracies.
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