A series formats

B series formats

C series formats

 A0

 841 × 1189 mm

 B0

 1000 × 1414 mm

 C0

 917 × 1297 mm

 A1

 594 × 841

 B1

 707 × 1000

 C1

 648 × 917

 A2

 420 × 594

 B2

 500 × 707

 C2

 458 × 648

 A3

 297 × 420

 B3

 353 × 500

 C3

 324 × 458

 A4

 210 × 297

 B4

 250 × 353

 C4

 229 × 324

 A5

 148 × 210

 B5

 176 × 250

 C5

 162 × 229

 A6

 105 × 148

 B6

 125 × 176

 C6

 114 × 162

 A7

 74 × 105

 B7

 88 × 125

 C7

 81 × 114

 A8

 52 × 74

 B8

 62 × 88

 C8

 57 × 81

 A9

 37 × 52

 B9

 44 × 62

 C9

 40 × 57

 A10

 26 × 37

 B10

 31 × 44

 C10

 28 × 40

Magnification Factors for A sizes

From:        To: -->

A0 A1 A2 A3 A4 A5 A6
A0 100% 71% 50% 35% 25% 18% 12.5%
A1 141% 100% 71% 50% 35% 25% 18%
A2 200% 141% 100% 71% 50% 35% 25%
A3 283% 200% 141% 100% 71% 50% 35%
A4 400% 283% 200% 141% 100% 71% 50%
A5 566% 400% 283% 200% 141% 100% 71%
A6 800% 566% 400% 283% 200% 141% 100%

See: International standard paper sizes