List of B Papers :

# B3 Paper Size

## B3 format is used for small posters, enlargements for B4, and paintings... It is always printed by professionals.

This format was standardized following the adoption of ISO 216 in 1975. Sizes B were first defined by DIN 476 (German Institute for standards), then based on Lichtenberg’s ratio, using as an universal basis the square root of 2 as a proportion between length and width in all B formats = length = width x 1.14142.

B3 format is sized to accommodate human writing: 500 x 353 mm or 19.69 x 13.90 inches. Its total area is 0.176 m² The surface of B3 size can also be reported in square yard (0.21), in square foot (1.89) or in square inches (272.8).

B3 format is 1/s a B2 or ¼ a B1. However, it takes 2 B4 to form a B3 sheet, or 4 B5 sheets. To refer to the largest paper in ISO 216, B0, B3 format is 8 times smaller.

One can obtain the weight of one or more sheets of size B3 by comparing its range to paper weight. For example, for a paper of 160 g/m², size B3 sheet weighs: 0.176 x 160 = 28.16 grams.

### The size in centimeters of B3 is 35.3 x 50

or 353 x 500 millimeters

### The area of B3 paper sheet:

• Square yard: 0.21
• Square foot: 1.89
• Square inch: 272.8