#### ISO A SERIES (mm) A0 841 x 1189 A1 594 x 841 A2 420 x 594 A3 297 x 420 A4 210 x 297 A5 148 x 210 A6 105 x 148 A7 74 x 105 A8 52 x 74 A9 37 x 52 A10 26 x 37
• Area of A0 = 1m^2
• A0/A1 = A1/A2 = A2/A3 = A3/A4 … A9/A10 = 2
• Length = √2 * Width

non-ISO sizes

• A3+ format (aka “Super B” or “Super A3”) 330 x 482 mm or 13×19“
• A2+ format 432 x 635mm or 17×25”

reducing size for scaled printing

```  From A1 to A2 = 71%
A2 to A3 = 71%
A3 to A4 = 71%
A4 to A5 = 71%
From A1 to A3 = 50%
A2 to A4 = 50%
A4 to A6 = 50%
From A1 to A4 = 35%```

increasing size for scaled printing

```  From A2 to A1 = 141%
A3 to A2 = 141%
A4 to A3 = 141%
A5 to A4 = 141%
From A3 to A1 = 200%
A4 to A2 = 200%
From A4 to A1 = 283%
From A5 to A1 = 400%
```

#### ISO B SERIES (mm) svg B0 1000 x 1414 B1 707 x 1000 B2 500 x 707 B3 353 x 500 B4 250 x 353 B5 176 x 250 B6 125 x 176 B7 88 x 125 B8 62 x 88 B9 44 x 62 B10 31 x 44

The area of B series sheets is the geometric mean of successive A series sheets. B1 is between A0 and A1 in size, with an area of 0.707 m2 (​1⁄√2 m2). As a result, B0 is 1 metre wide, and other sizes of the series are a half, a quarter or further fractions of a metre wide.

• B5 is a relatively common choice for books
• B7 is equal to the passport size ID-3 from ISO/IEC 7810
• paper_size.txt
• by nik