Q.1085: What is C3 sheet size?, What is iso c3?
Ans. The C series is used for folders, post cards and envelopes. C series envelope is suitable to insert A series sizes.
As per ISO (International Standard Organization) C series cut sheet sizes, C3 is 324 mm wide and 458 mm long sheet. Equivalent size in inches is 12.76" wide and 18.05" long.
For all ISO and US sizes, click here