The international standards organisation (iso) system of paper sizes is based on a series of three sizes a, b and c. Series a is used for general printing and stationery, series b for posters and series c for envelopes.
The international standards organisation (iso) system of paper sizes is based on a series of three sizes a, b and c. Series a is used for general printing and stationery, series b for posters and series c for envelopes.