iso-logo

International Organization for Standardization


ISO (International Organization for Standardization) is an independent, non-governmental membership organization and the world’s largest developer of voluntary International Standards — made up of 162 member countries.  Links to more ISO paper standards.

A -, B -, and C Series formats, measured width by hight

A Series formats (mm)

B Series formats (mm)

C Series formats (mm)

4A0 1682 x 2378
2A0 1189 x 1682
A0 841 x 1189 B0 1000 x 1414 C0 917 x 1297
A1 594 x 841 B1 707 x 1000 C1 648 x 917
A2 420 x 594 B2 500 x 707 C2 458 x 648
A3 297 x 420 B3 353 x 500 C3 324 x 458
A4 210 x 297 B4 250 x 353 C4 229 x 324
A5 148 x 210 B5 176 x 250 C5 162 x 229
A6 105 x 148 B6 125 x 176 C6 114 x 162
A7 74 x 105 B7 88 x 125 C7 81 x 114
A8 52 x 74 B8 62 x 88 C8 57 x 81
A9 37 x 52 B9 44 x 62 C9 40 x 57
A10 26 x 37 B10 31 x 44 C10 28 x 40

Large-format poster names and printing sizes, measured hight by width

Double Quad Crown 60″ x 40″ Elephant 28″ x 23″
Quad Demy 45″ x 35″ Super Royal 27.5″ x 20.5″
Quad Crown 40″ x30″ Double Foolscap 27″ x 17″
Double Demy 35″ x 22.5″ Royal 25″ x 20″
Quad Foolscap 34″ x 27″ Medium 23″ x 18″
Double Large Post 33″ x 21″ Demy 22.5″ x 17.5″
Double Post 31.5″ x 19.5″ Music Demy 20″ x 15.5″
Imperial 30″ x 22″ Crown 20″ x 15″
Double Crown 30″ x 20″ Post 19.25″ x 15.5″
Foolscap 17″ x 13.5″