ISO B series

B3 paper size

B3 measures 353 x 500 mm (13.9 x 19.69 in). Posters, art prints.

353 x 500millimetres

13.9 x 19.69inches

4,169 x 5,906pixels @ 300 dpi

Dimensions in every unit

Unit	Width x height
Millimetres	353 x 500 mm
Centimetres	35.3 x 50 cm
Inches (decimal)	13.898 x 19.685 in
Inches (fraction)	13 7/8 x 19 11/16 in
Points (1/72 in)	1000.6 x 1417.3 pt
Picas	83.39 x 118.11 pc

Pixel dimensions by resolution

Resolution	Pixels	Megapixels
72 dpi	1,001 x 1,417 px	1.4 MP
96 dpi	1,334 x 1,890 px	2.5 MP
150 dpi	2,085 x 2,953 px	6.2 MP
200 dpi	2,780 x 3,937 px	10.9 MP
300 dpi	4,169 x 5,906 px	24.6 MP
600 dpi	8,339 x 11,811 px	98.5 MP

300 dpi is the usual target for printed photos and artwork; 72–96 dpi is screen resolution.

Document size with bleed

Bleed	Millimetres	Inches
3 mm bleed (each side)	359 x 506 mm	14.134 x 19.921 in
0.125 in bleed (each side)	359.4 x 506.4 mm	14.148 x 19.935 in

How many B3 fit on a press sheet

Sheet	Without bleed	With 3 mm bleed
B2 (offset)	2-up	1-up
B1 (offset)	4-up	2-up

Simple grid imposition with no gutters or gripper margin; real layouts may fit fewer.

Envelopes for B3

Fold	Folded size	Envelopes that fit
Folded in half	250 x 353 mm	DIN E4 envelope

The √2 system

B3 has an aspect ratio of 1 : 1.4164 — close to √2 (1.4142). Folding or cutting it in half across the long side produces the next smaller size in the series with the same proportions, and two sheets side by side form the next larger size. This is why scaling between sizes in the series (for example on a photocopier) never crops or distorts the page.

Frequently asked questions

What are the dimensions of B3?

B3 is 353 x 500 mm, which is 13.9 x 19.69 in (13 7/8 x 19 11/16 in).

How many pixels is B3 at 300 DPI?

4,169 x 5,906 pixels at 300 dpi, or 2,085 x 2,953 at 150 dpi.

Sources & data

Dimensions per the relevant standard; see sources.