Base Size

inch

×

cm

×

Units:

Important Note:

For practical measuring and cutting purposes:

Imperial measurements are shown in ⅛ inch fractions
Metric measurements are rounded to the nearest millimeter

More precise decimal values can be found in the calculator view.

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C3

ISO Envelope Sizes

45.8 × 32.4 cm

~18 x 12 ¾ inches

45.8cm

~18 inches

32.4cm

12 ¾ inches